Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec60d65f2b87b328…

MALICIOUS

PDF

74.6 KB Created: 2021-03-21 03:22:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3ad97e03316f81523fad51c60871ed71 SHA-1: 4047ca633e474eac2f4fe2669b830496befb3705 SHA-256: ec60d65f2b87b3289764086665cdf623e306ecef258136ee5fc36c3080232054
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, with one prominent URL being https://fokemale.ru/aws?utm_term=6.0+powerstroke+turbo+install+kit. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links. No scripts were extracted, but the structure and heuristics point to a malicious document designed to exploit link farms for traffic or malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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/aws?utm_term=6.0+powerstroke+turbo+install+kit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383917/normal_60155c6d1c07c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413473/normal_5ff0c843c9077.pdfIn PDF document text
    • http://jerunuju.mypressonline.com/80441352464.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/lugotem.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/how_to_determine_the_molecular_geometry.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494140/normal_5ff4cfc78604a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/frere_jacques_flute_sheet_music.pdfIn PDF document text
    • http://dopovis.myartsonline.com/8699833108.pdfIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_b0a6a3bdccb5497fa81460b0ddbaab28.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/52114985926.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/47115300223.pdfIn PDF document text
    • http://kojuvurapamox.myartsonline.com/ribuzajuninezesopopiz.pdfIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_d09852bdfc06411089b294cc52f77ba2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/92df79f8-1354-4028-af78-7033742628d5/delizojoravuduwugitat.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/87517511072.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/videnumulizefumuxogaruko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/357cce14-a78e-4c6b-9437-4a3ceb0d2c72/what_is_punishment_reinforcement.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_off0000e882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE882 5344 bytes
SHA-256: a6d86d1bb716ab1edebd28557563212f11065c3dd80eca8437a6733586b1fc21
font_01_sfnt_off0000facd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACD 10184 bytes
SHA-256: 3ff828ecfa81e86944d73ac422cd0085a060d34b42e3200c8c11cdc7d652154d

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