Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb13508bfb08793…

MALICIOUS

PDF

68.9 KB Created: 2021-01-21 12:37:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 532ff6a57267b40f5236f42666db1529 SHA-1: 4c3a7712b61739ceb62462a790102ad2011a4663 SHA-256: 2bb13508bfb08793bad61ee9b2032985d32d31bfe32a8f9e53b79d650594d834
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an external URI pointing to 'traffnew.ru', which is likely part of a phishing or malware distribution chain. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a malicious purpose related to link manipulation and disposable hosting.

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 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://traffnew.ru/aws?utm_term=bana+congo+audio PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446500/normal_5ffbd95202e35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390371/normal_5f959d2fb0d54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492278/normal_5fd649b45f22d.pdfIn PDF document text
    • https://site-1216840.mozfiles.com/files/1216840/indesign_book_layout_template.pdfIn PDF document text
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/44475beaad42.pdfIn PDF document text
    • https://tiruvodeg.weebly.com/uploads/1/3/4/8/134892329/4d3346176d989c.pdfIn PDF document text
    • https://site-1175602.mozfiles.com/files/1175602/tutogedomipebi.pdfIn PDF document text
    • https://pabebubi.weebly.com/uploads/1/3/2/6/132695301/tugaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378641/normal_5fd19dc729b81.pdfIn PDF document text
    • https://site-1172486.mozfiles.com/files/1172486/amazon_hub_counter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375358/normal_600687afba66b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465908/normal_5feec0ec72007.pdfIn PDF document text
    • https://site-1084156.mozfiles.com/files/1084156/wipemapadunibepepo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494681/normal_5fafad1e63faf.pdfIn PDF document text
    • https:///\/a10.gaanacdn.com\/images\/albums\/60\/619360\/crop_80x80_619360.jpg,sanat����:{artist_id:3In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/tivuj.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/chori_chori_song_salman_khan.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_off0000cd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD00 4852 bytes
SHA-256: fe696cb54f9a38a3a717e8a68f18893727be2acd4f9381df57f848cf16030921
font_01_sfnt_off0000dd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD96 12924 bytes
SHA-256: 8341f355f304175d3890e42fde898e3bb58c4c10873617397250a04a47098eb0

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