Malicious PDF — malware analysis report

Static analysis result for SHA-256 69fe315a342bf69b…

MALICIOUS

PDF

54.2 KB Created: 2021-09-26 12:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 1325b76e1d03776db78fe6ad4dd76709 SHA-1: a9494649fa4079edca4f68933a07b642ca8b109d SHA-256: 69fe315a342bf69bc277ce337717ee1470de312b157badd2f7ad7b1bbe1e8ce1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further support its malicious nature. The presence of external URIs and link farms indicates an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7372

Heuristics 5

  • 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
  • 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://chcial.ru/uplcv?utm_term=grand+theft+auto+gta+5+online+gunrunning+download PDF link annotation
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16132ca64868f4---lamegofifedabube.pdfIn PDF document text
    • http://trungtamdaykem.vn/Images_upload/files/17700639092.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/16104633041.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/36973062250.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a265475a4---35443855396.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/21853771924.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/fiwegofekofuvezufuzuxiw.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/33310499388.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/f92c4be752819ed5c7a7a6a1f7a7800a/gekupevasanumujupopilel.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1614dc4dde6242---20407204912.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/12639479466144831b30d59.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/In PDF document text
    • https://corpus.bg/files/fck/file/72933047592.pdfIn PDF document text
    • https://perfumes.dropship-tracking.com/userfiles/files/xeruwifole.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/dagidimewun.pdfIn PDF document text
    • https://ubitanduk.com/contents/files/getotemasaxobaleximofe.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///vijadizivoxib.pdfIn PDF document text
    • http://topaslt.com/userfiles/file/vafojinomodirawibimifo.pdfIn PDF document text
    • http://jjc-dev.com/userfiles/file/galonuduwaketuxum.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/gebejoji.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/bupexinigokosesigom.pdfIn PDF document text
    • http://myredm.ru/uploads/file/6035339770.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/75881429101.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB078 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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