Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fea9247b88f4e0d…

MALICIOUS

PDF

89.3 KB Created: 2021-06-14 00:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 769e7965e8f1ed202cb8cdd04d3c2ce1 SHA-1: e9257101bd6ef1980436c63601c7bc14c3bce08d SHA-256: 6fea9247b88f4e0df067bdb6e76359449779905e7c427fe503fd432e17c679e9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The primary URL, 'https://philabc.ru/pbw?utm_term=download+novel+jannat+k+pattay', is likely the intended destination for users, disguised as a download. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://philabc.ru/pbw?utm_term=download+novel+jannat+k+pattay PDF link annotation
    • https://sigovopar.weebly.com/uploads/1/3/4/6/134632241/8043343.pdfIn PDF document text
    • https://livekurot.weebly.com/uploads/1/3/4/4/134443702/70032cb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450240/normal_5fe3e9a1eeee4.pdfIn PDF document text
    • https://xomowozijirogap.weebly.com/uploads/1/3/4/6/134667332/jiwojafexob-xojasibapoziz-mesori-jozulodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_6036286fa53d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482631/normal_60584375e13d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411218/normal_60b80e1f023dd.pdfIn PDF document text
    • https://semitedajun.weebly.com/uploads/1/3/1/6/131636975/c234c9d1a0ce.pdfIn PDF document text
    • https://fukuzemuk.weebly.com/uploads/1/3/5/3/135306557/kamufodaka-jumile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461773/normal_60c42f1486b27.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/2ebee612-d748-41fb-82e4-433e3d72a0c5/62976859117.pdfIn PDF document text
    • http://serawazeg.pbworks.com/w/file/fetch/145199583/25729931717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab1caa36-f2fd-4bba-8ee0-c293f87f4b87/276255018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5e7bc0-6306-4532-aee0-a491630fdcc6/20665656277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd90097-c473-4971-99e4-b5d425213c14/60875561449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66737560-908b-4ac6-a23e-f280efc3f57f/61516028989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd7d08f-7c73-4967-84bc-eeb24baaf987/what_is_yoga_flow_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aa0e59a-2091-4176-abfc-9e41f689ab1c/xiririnufita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/506bcbcd-d711-4a00-b466-dd513a30e437/maytag_bravos_xl_washer_owners_manual.pdfIn PDF document text
    • http://dadilotofexi.pbworks.com/w/file/fetch/144957315/kerajopo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EC 5072 bytes
SHA-256: f2be1d5ea985adfac821a9f98239ba66aad133b50800c6ade00dc86e8019056f
font_01_sfnt_off0000f966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF966 10824 bytes
SHA-256: d37ed76fd18ebba73c7991fe4ca4fb1148b289a3029608da3299c190c235fc6e
font_02_sfnt_off00011924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11924 10920 bytes
SHA-256: cbd22dbf7860477b0aec630a727595c5c545ebba4991084438c2e84d0eb9819b
font_03_sfnt_off00013ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA2 17156 bytes
SHA-256: f7a478fe50a0a79ac2645e26c8c3d3e2e9ff0e13f2e0bccfeb03abe889205ef0

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