Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a74df2ab207d40f…

MALICIOUS

PDF

81.2 KB Created: 2021-09-06 16:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9a335ba2bdf32fd55533a0c899cfd747 SHA-1: faf31fc9562ba94b6c12affe643c13f3a53a876d SHA-256: 9a74df2ab207d40f033a0387ac3ee9269115c3d6e0829d008a3e2ce55fd50805
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of external URIs and the link farm structure indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://garglob.ru/uplcv?utm_term=simplification+questions+for+class+6+with+answers+pdf PDF link annotation
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cd0424964---49331617594.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/83707325642.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/6a8032f8d8ff832a2420fddc50fa7c67/75988616837.pdfIn PDF document text
    • https://best-label.com/upload/files/60639749092.pdfIn PDF document text
    • http://nessium.net/userfiles/file/sosalita.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///walarulizamir.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/6f03f62a85458ef9ed8a88ae517741da/9121348197.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/nitevegemuxabedaji.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/9a56a1a734a1b04375398d60d74be9be/26237879930.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b97e64879b1b6438f95b42b0b618cdec/meperesinenamup.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44304711038.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/davilogi.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/6nvig2pe4bomjf3vtvp560k7t5/wuwijev.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/3d6806244bfa560ab709f10ecf40c4a1/fefalinuwomu.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/zevabagil.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b560c6605d---pizotifadoraxotugo.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/7didveoc6q9febduntd6is6601/lodugizezijakas.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210719_EBCF141055404967.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/12596206515.pdfIn PDF document text
    • https://foulardfotografando.it/file/vuwafabubezilakufib.pdfIn PDF document text
    • https://activepymes.com/pub/file/faravetowadimikokisalu.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/89202743207.pdfIn PDF document text
    • http://proart.by/media/file/5618620042.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/tedekibabag.pdfIn PDF document text
    • 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_off0000d722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD722 17424 bytes
SHA-256: b04db48064525cb7652d15ec49ba70df6a58f8a7807d04c9d2a5bd96de0d3b40
font_01_sfnt_off0001046d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046D 11460 bytes
SHA-256: 38ba0eb142a05d12347d42a0e4b759935198fe306b595bb4f8e5de750d8da76c
font_02_sfnt_off00011f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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