Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89f946ac40fb332…

MALICIOUS

PDF

89.6 KB Created: 2021-07-20 15:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4888d903a89148b66661bc83a4dda8ea SHA-1: 0d2b954a062a4d6c5458308109e5df209b17fa8f SHA-256: b89f946ac40fb332274493d8a630196a70d2d823ed221c6e757a585457c98836
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for phishing or malware. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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 https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/867998807529953c44632e2053a8fc40/xozadijide.pdf In PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/7ajse6v4ua0bv4hul8jrn1du01/75057715564.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/22e6949d15018702fcfbb5f4a5e455dc/bowibajanipevarok.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/dibebuforabudo.pdfIn PDF document text
    • http://harveyfamily4016.com/clients/5/51/51a16c7d09a65bdad6d3cd8ef7da6b4e/File/xewasutufisirum.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/sagidipejavidutosazebo.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/nsu34ue9era01mp60u4hr8vkf4/33067327511.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/21476366739.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/buvanenokir.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/u81gjre3vhkajtv2q0p830tht0/likewawonovivifaluv.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/38531118351.pdfIn PDF document text
    • http://maihome.hu/admin1/file/zagoxotagoluvixamogo.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/56903999619.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804c8d45165---jifim.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/34734674769.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f70467e24---77903325807.pdfIn PDF document text
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/vimejelapigibatoxebipi.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/bekixufu.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/gv6k9uub46g6ekmthgunmp6lcs/jotezemolemuma.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/69855512960.pdfIn PDF document text
    • https://migger.dk/userimages/file/93963270653.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/3c6f78bac0fe49fa5f120552b8d71efc/dasujedipegev.pdfIn PDF document text
    • https://digireg.cz/upload/nivamanifufibetetuto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=sociology+first+year+notesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C4 10700 bytes
SHA-256: f472c8b1ac9fd6bf71f8b032bed75774601d554c9b2070292fb1b1ab44a6b6a8
font_02_sfnt_off00012275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12275 17348 bytes
SHA-256: 8d978dc83efd2b3dc8523be53ef5cc39bb49be423ee90febf719b1705f118021
font_03_sfnt_off00014ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FF9 1896 bytes
SHA-256: 25de5a2881ede4a19ca9d5f8264fa0c195b137d37d1a641e4b472da9178b3a41

Open this report in the interactive analyzer, or submit your own file for analysis.