Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e2456b13d5088d…

MALICIOUS

PDF

82.1 KB Created: 2021-05-25 06:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 48627ed8c12bad89481f4c8ced42dc5d SHA-1: 23a0fd01f76c4a06b779bb0e5deef86da41cb450 SHA-256: 17e2456b13d5088dd5194e44e79a468ec25cd90f6bf45224154f9db7c5900bbb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious sites or download further payloads.

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://maypoin.ru/strik?utm_term=download+wifi+mac+changer+premium+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488581/normal_602064b1b57e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470839/normal_5ff5a2db79334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481841/normal_605b72519b61b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480142/normal_5fd94db75f6f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460970/normal_60622771c5e28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5fd3d9d17712d.pdfIn PDF document text
    • https://wadasazaba.weebly.com/uploads/1/3/3/9/133999184/worutu.pdfIn PDF document text
    • https://kuxozofaxaxasij.weebly.com/uploads/1/3/5/3/135325708/jewugosamizaw_totovalazamozaz_nuxibuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389805/normal_5fe8edac7a980.pdfIn PDF document text
    • https://firupewuvub.weebly.com/uploads/1/3/4/3/134330425/9872160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_5fe99919e287b.pdfIn PDF document text
    • https://tarazedi.weebly.com/uploads/1/3/4/6/134687061/matos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/76489a47-8b06-4e6b-bb2d-cae41c3303ef/chamberlain_universal_remote_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a3ad79-ddb4-4641-b258-cd22d9dcd462/how_much_sugar_is_in_a_large_dunkin_refresher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01d83f09-73b4-4153-ba38-a7e4f29d884f/twilight_saga_books_white_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ecafb1-e09b-412b-9536-87dc1cbaa986/90121353006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721d41f8-a0f5-4b01-bfba-47b64bb0d3a6/vabeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc470f79-8abc-4f33-8e1d-77136a5ee3ff/94264829579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d03a7ff7-91ee-4c03-be94-973932d5fa9a/46995464768.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_off00010063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10063 5548 bytes
SHA-256: 4f999be84de2c24d88a407cd70a29b9d243aa7bfb64ddd9cc5a3f36fd064c87f
font_01_sfnt_off00011335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11335 11180 bytes
SHA-256: 42719d5b32627947bf03ff2bec0ad48babccbdfeedb09c975ad713b1c0dfc18f

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