Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56e294040d4cb6b…

MALICIOUS

PDF

87.8 KB Created: 2021-03-31 05:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5725907e043e0d55b23b30462e32be2 SHA-1: 70782bf6d3f965230fb12144b7eb73ef53df150a SHA-256: d56e294040d4cb6bff005a6f45584100134904321d200273e1922ef64801d510
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with attempts to redirect users to malicious content.

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://baarspo.ru/award?keyword=autodesk+sketchbook+pro+tutorial+pdf
    • https://ripumoravoramex.weebly.com/uploads/1/3/1/6/131606135/8064036.pdf
    • https://cdn.sqhk.co/gefimiwotux/soidhQ7/41832006822.pdf
    • https://cdn-cms.f-static.net/uploads/4480403/normal_5fdc6f809ce52.pdf
    • http://kagaromorin.medianewsonline.com/53171225464.pdf
    • http://poroda.site/47383702352qiq7k.pdf
    • http://supermagazforsale1.xyz/pivomanabixo3k45j.pdf
    • http://getcreditreport.info/conditional_type_0_1_worksheeto9kun.pdf
    • http://natur-green.fun/foxeer_arrow_mini_pro_manual0pcpb.pdf
    • https://cdn.sqhk.co/libibajuzumu/Vr9hXp5/40612153723.pdf
    • https://static.s123-cdn-static.com/uploads/4379742/normal_5fe15129e70be.pdf
    • https://jevizaja.weebly.com/uploads/1/3/4/8/134869407/mimuvudobumotekozuw.pdf
    • http://laketofetujeso.medianewsonline.com/xotelewoj.pdf
    • https://lovarewido.weebly.com/uploads/1/3/4/3/134322716/zurovirafopojadoripe.pdf
    • https://kogababofaf.weebly.com/uploads/1/3/0/9/130969162/nelil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2f0eb676-6486-4094-be35-d41d2bd879f6/modo_de_produccion_feudal_al_capitalismo.pdf
    • https://uploads.strikinglycdn.com/files/35644fcc-b9c8-4117-a47a-c788a33a1b70/nourishing_traditions_bread_recipes.pdf
    • http://rofuvawitarul.atwebpages.com/waralaxikorakidine.pdf
    • https://uploads.strikinglycdn.com/files/d1934e32-1c24-4663-9dcc-88b47c3e619d/90276999137.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c46.bin
9e378460e1e113e0b03e64d17bf38d22ecdeff31e1f7ad67cefda055d6e885da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C46 5436 bytes
font_01_sfnt_off00011ebc.bin
72c97c163f7321d7516ff39fc929f1378babbe9d4d92fed2dcd63f2cce33d1ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBC 23548 bytes

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