Malicious PDF — malware analysis report

Static analysis result for SHA-256 d31a04b17a36d439…

MALICIOUS

PDF

76.8 KB Created: 2021-06-13 17:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e32ecc0599c5caa07936a28121c344d3 SHA-1: bb54628fecb9cc5331adfca184ccf309dd941117 SHA-256: d31a04b17a36d4390358f41b267843482fa162ae53080957fa12bb980172b6f2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a phishing or malware distribution lure, indicated by its classification as a 'Pdf.Phishing.Trojan' by ClamAV and a high ML score. It contains numerous links to external websites, some of which appear to be compromised WordPress installations, suggesting an attempt to redirect users to malicious content or downloads. The presence of a 'Download button' heuristic further supports the interpretation that the document is designed to trick users into initiating a download. No scripts were extracted, but the overall structure and linked URLs point towards a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/uplcv?utm_term=99+names+of+allah+mp4+download PDF link annotation
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/4ed951a87bf1eb9f9935b5b153168e19/93313382891.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/kebasolifivomopox.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607816d7173e2---79388075827.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1621639789.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/3646c338c6b651e5cfa516d901f7ac53/14719431596.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160818ed73fdf5---72619717517.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb13758a0c---leladibul.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1609ddf49bd7fa---49062578317.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/5fem32pnv5el342cch20jt69i4/vabix.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/34a04b1149c030a0736b00690c6e2aaf/rogopurasiwujux.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077286e21d22---82316882207.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/tunowago.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609aaf1867de2---45982872692.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000ce89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE89 5428 bytes
SHA-256: 932e3a659a26f1852a43420b70305ea3f6e491ee8a4eea5cc0e67de42fe5fcc7
font_01_sfnt_off0000e0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F0 11144 bytes
SHA-256: 012b6e96f81481d85075d53877d0de371f202177458c57c2514de2488f762c9b
font_02_sfnt_off00010710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10710 18948 bytes
SHA-256: a9822c81aac5ca346e4a2398e1f05ee600ca28492ed7a9768bd50e06931bafa6

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