Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e1e22180f0b0bd…

MALICIOUS

PDF

73.9 KB Created: 2021-09-14 14:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 297851b4890a0cc8418b8788b024fe17 SHA-1: d5035ada6ad4add679d98e240b19fd10201f552e SHA-256: 60e1e22180f0b0bddc0327922b12098455c490b1a7563be7d1842676c362b0dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and link farms points to a tactic of directing users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dpbtaqsuitmbndib6b7iljqa54/5972001220.pdf In PDF document text
    • https://superchills.com/userfiles/file/96057683777.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/17209585265.pdfIn PDF document text
    • http://khojedu.net/userfiles/file/pamosutixunitix.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161375b5d97339---tulosekajimowugetaluk.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/nujoliwofubusi.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/sanir.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/34622941339.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/teduj.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/bolaxedadimive.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/majojogotejikutulesam.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b5d4b8787---libavawusifufodetekuruk.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/rozubuzububebinidupoma.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16131f4bf37305---94742031116.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/14986897872.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddae34b7f9---mefobu.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/dobosuxuw.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/jovuzusidavino.pdfIn PDF document text
    • http://nbkhjc.com/uploads/202109/file/210906223834616073mu27k283m196.pdfIn PDF document text
    • https://cncunse.com/d/files/33209150622.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/61036130022.pdfIn PDF document text
    • http://vako.vn/app/webroot/uploads/files/45857467217.pdfIn PDF document text
    • https://lotte-ppta.net/beta/assets/file/wizasitikip.pdfIn PDF document text
    • http://chayka-svg.ru/files/27290910856.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+do+people+hack+into+phonesPDF 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_off0000c296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC296 10680 bytes
SHA-256: 87dfe3628c1cfc7d3f2749bb817bac87d80ce89df89f18147652975dd1e9cbbd
font_01_sfnt_off0000db0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31D 15304 bytes
SHA-256: e3460c4564f3cd13eb6a4b334d505c9fa02b2c3e40b44fc898768c422be4c522