Malicious PDF — malware analysis report

Static analysis result for SHA-256 929ff06dbb80790b…

MALICIOUS

PDF

99.2 KB Created: 2021-06-30 20:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5e49f91abe6b859ee28d76ef24553183 SHA-1: 32486c5fc19f7d36ee48e3519edbdfa68f2ff03f SHA-256: 929ff06dbb80790b87e35cf31f48dda8a175900d985b0eefef54b2bb36568c3a
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics suggest it functions as a link farm, directing users to other PDFs hosted on compromised CMS upload storage and disposable hosting. The content lures are consistent with advance-fee scams and fake invoices, aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8775639ea---sijugopatafe.pdf In PDF document text
    • http://skomi.ru/img/files/file/16495342756.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/700f664d8f70d8c5ccf970c755034151/tuxisiz.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/vexilotojolipiremoxin.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160d976b9cc8cd---83666276625.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4086f80c564eb490563348a9c66986e5/vuwiwatomegumesibipove.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/rd8cd59q5jv9cr5tcokh42454q/vovesixidimevod.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8bf50a18---kubisoxatugijusu.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/wusedefo.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/61537545704.pdfIn PDF document text
    • https://arabacioyunlar.com/calisma2/files/uploads/34972920091.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/28130111917.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/b81cer3rmtgm2gjpuj6u6eikq7/44982736730.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/49f7f348653d9e8a4bd4620fbec29804/rorudote.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608224835bf8d---kokorakikesuroxozo.pdfIn PDF document text
    • http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/xemusiri.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/7679037465.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dc02f1cf3---bagefujoxosimobo.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/39788766266.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077400777357---xogawegulivepinosipatuj.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/9b871c2b8d6e9c3753165c5fa624e86b/77325998622.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160822d00918b8---kolipobu.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f86ca4c40---jizelaxaru.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/573d0ed84869669c98b0c1931f483b42/nevasedamodeme.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/d6fa5384a303f59ba5b9038529a82f5b/zurarikamis.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/jesoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=dictionary+words+beginning+with+ePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12089 17372 bytes
SHA-256: 9a455e104e5fa9447a325f7e9206446dc1775be2ecfd8309138a2eb16bd3e080
font_01_sfnt_off00014c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C4F 10944 bytes
SHA-256: d640a53e6fb73f7f8d6bf0a6c081b240d3a085edb8a666b19ed17b5cd23eb5e6
font_02_sfnt_off00016591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16591 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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