Malicious PDF — malware analysis report

Static analysis result for SHA-256 49265ae210cc0494…

MALICIOUS

PDF

145.1 KB Created: 2021-08-24 20:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cc9f2eb857d7929e0fb7763f6fe8445d SHA-1: e67b0c8ac6253ebb37554bb5cddb262870530405 SHA-256: 49265ae210cc049406bf373826e2061fac517c3b52d3585f16671571f9a0b4f0
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic findings suggest a malicious workflow designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://queure.ru/uplcv?utm_term=bsc+chemistry+notes+1st+year PDF link annotation
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/6bce20110110e985b186e1ab6a092315/29427097399.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/15beae80e6df98a3817dc875b73397d7/jisoxev.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/15659917411.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/2a77ce2f732a1398e3ae560fe85d905e/73078004954.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/19584568907.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a94b7d910---76671216372.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7d9028d1---21764455541.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/b3754115eaa3e78433c486d6a4990ee6/gupojabapezilonukir.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/17722366034.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107f7e1bc14d---firalevoxa.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/65picbneh8egmm8n0go9iutj90/sejozazopom.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/17100996525.pdfIn PDF document text
    • https://booburger.myagenda.cz/pictures/editor/files/wosatibug.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/5031024765.pdfIn PDF document text
    • http://beateromer.com/bilder/file/29875138381.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/21260948153.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/70691025304.pdfIn PDF document text
    • http://chromatographvials.com/d/files/28015831684.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210810231155.pdfIn PDF document text
    • http://tara77.com/clients/46590/File/80669514927.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c805183527---30035586585.pdfIn PDF document text
    • https://triosms.com/userfiles/file/20740641602.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D595 18248 bytes
SHA-256: 9788f373272b7fb7dbce6b04c822b18da93989d23603b91edc70019e38319760
font_01_sfnt_off000205a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x205A1 10668 bytes
SHA-256: 52c59b6a0233a66828555d021d2c2b6297b3c41e12db97c60dfd49c7865d8a66
font_02_sfnt_off00021e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21E06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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