Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7b4ae09883c04c…

MALICIOUS

PDF

80.8 KB Created: 2021-03-31 00:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4563e04660ec20be942b973055f064ee SHA-1: ddaafcba680f69302aafe745a72b675130fda942 SHA-256: 8e7b4ae09883c04cd43581fb3773fb844f8d4107ee022d61354bdaa62e57b263
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/strik?utm_term=what+is+proportion+in+interior+design PDF link annotation
    • https://xewidepomizexas.weebly.com/uploads/1/3/0/7/130775014/vexetuguwo_lefagefijowex_raguludole_rizarozetuxixa.pdfIn PDF document text
    • https://xebagaxasu.weebly.com/uploads/1/3/4/8/134878678/kisukivugubokoxo.pdfIn PDF document text
    • https://vesifumami.weebly.com/uploads/1/3/5/2/135294942/4080496.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/7jfLoRj/otc_incontinence_medication_for_dogs.pdfIn PDF document text
    • https://cdn.sqhk.co/xunalafugapa/ghNidhf/transformare_cm_patrati_in_metri_patrati.pdfIn PDF document text
    • https://susuravi.weebly.com/uploads/1/3/1/1/131164319/jedeseviku.pdfIn PDF document text
    • https://ketevifut.weebly.com/uploads/1/3/1/4/131453005/286387.pdfIn PDF document text
    • https://megopupe.weebly.com/uploads/1/3/1/1/131163834/mimopikev.pdfIn PDF document text
    • https://cdn.sqhk.co/liminekaj/drijXgg/90219911070.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/702a63.pdfIn PDF document text
    • https://nidabiweni.weebly.com/uploads/1/3/4/8/134865500/xilora-jarasipixalo.pdfIn PDF document text
    • https://cdn.sqhk.co/pemiduwegam/gjcZiiz/64456653266.pdfIn PDF document text
    • http://lenafitokid.iblogger.org/50051760787.pdfIn PDF document text
    • https://zawevujavesid.weebly.com/uploads/1/3/2/8/132814930/4119481.pdfIn PDF document text
    • https://xixozikitep.weebly.com/uploads/1/3/4/0/134097223/kavajeb-rudewiwej.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/if1agh2/school_and_neighborhood_map_for_mcpe.pdfIn PDF document text
    • https://cdn.sqhk.co/dexasubu/b3eoahd/15594369499.pdfIn PDF document text
    • https://zazibarem.weebly.com/uploads/1/3/0/7/130775746/rozemasop.pdfIn PDF document text
    • https://gapepaweduli.weebly.com/uploads/1/3/5/4/135400658/gevenepukedane.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/cgghags/fadegitajelozilakejim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suvumudupese.epizy.com/bemiwogujuwumesuno.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB20 5200 bytes
SHA-256: e9eeacf4dcf295aece0f9676a2d9ae52c452a0d115560bf4bb3e4a2889f8feff
font_01_sfnt_off00010cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD8 11340 bytes
SHA-256: c9f10a73114579ede935825975b0886268d4fdaa5b5ec2b01acaea5beced7b29

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