Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89fe0f7f04c3afc…

MALICIOUS

PDF

88.3 KB Created: 2021-07-27 18:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f798b36cffe0b79131b696f3c361c9d2 SHA-1: 5579fa8f303c9472a0416b280b7066304b5c4a33 SHA-256: d89fe0f7f04c3afcc5ceb9582be4a9720a084edfeb3a035db151ce948fc278ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing to multiple compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDFs designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://tencanpowder.com/d/files/28600500456.pdf In PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/7d04132f5ee6eb48ba9fd3e073a272d1/pixirefo.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/2385571448.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/wewulipujorekopatope.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/wetovumitawuviboxa.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/d2oavthou4giqlhv7d2b6hsrv4/xeborawexurofog.pdfIn PDF document text
    • http://lyshiying.com/d/files/xafemes.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/76f7ccb1b2f6dea9578240f649357b8a/vufinexazegibidogomijawaf.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/vupalodakafugaxaxotuta.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/mhvnc06ulc4k9l0sc9s6a9im81/bitudurixofibofase.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a260b1ff0---38957479871.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/wadagowokivezapopi.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/c66039f7299ab625c80e473628ed98d1/93451077059.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a4adc91cc6f---70753524783.pdfIn PDF document text
    • https://asi-filter.pl/files/file/4616977128.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/20176203488.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/dofopojosizuravozubew.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/jibinidiwur.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/58232482092.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0ffa05532b70ae1226b3ee9d561f2404/viwemerafixazizana.pdfIn PDF document text
    • http://ahs1968.com/clients/d/dc/dcea35c349c70fb55dca458fc6558ff6/File/turafipuguvuzokimipitowaw.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1481dc608e---14117488534.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16091160a80cfa---41443600853.pdfIn PDF document text
    • http://dges.in/userfiles/file/70549883961.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/rm16pspafatr51ooang6s09rv3/wapifinovi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=the+giver+chapter+13+summary+preziPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D9 11080 bytes
SHA-256: bb9cdd27787ba4951571d24497e5a95f51ec8466d70453eddb6db1f65b3071dc
font_01_sfnt_off00010cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDC 17220 bytes
SHA-256: 731cde9a712fb89905ac6f544f28aca3e95a97fcdf574afee1b6052a7bb318a1
font_02_sfnt_off000139d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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