Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc64b54167e5047…

MALICIOUS

PDF

77.2 KB Created: 2021-03-29 23:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a413a53ce42b1a11c52f26b3e8582606 SHA-1: 75b6089e772bea98319d09be62fc841216748e58 SHA-256: 2dc64b54167e5047d31b1f10d53d1cb42bcf0822022d21498bae5d7dfd9a78c6
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, with one prominent URL leading to a suspicious domain, suggesting a phishing or malware distribution attempt. The PDF structure and embedded content indicate it functions as a link farm, likely to obfuscate the final malicious destination.

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://lozipotod.ru/strik?utm_term=is+a+relationship+worth+it PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388617/normal_602c04683d2c9.pdfIn PDF document text
    • https://vakuvovigoder.weebly.com/uploads/1/3/4/4/134467198/6a677e.pdfIn PDF document text
    • https://xinuxarovota.weebly.com/uploads/1/3/0/7/130776268/de3702072a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481163/normal_601f2fdd4f89a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495551/normal_5ffac21ad3a19.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/t0rhdjf/pexalazet.pdfIn PDF document text
    • http://wupemokabate.scienceontheweb.net/16904962922.pdfIn PDF document text
    • https://tulosiwawi.weebly.com/uploads/1/3/5/3/135326734/3776600.pdfIn PDF document text
    • https://cdn.sqhk.co/pategazikiw/gie03Hi/linkmenu_ezerai_aruodas.pdfIn PDF document text
    • http://nipobudagese.mypressonline.com/aprendiz_de_brujo_david_bronstein.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/tewiminuz-ribidorevewuno-mirikexujasu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368225/normal_5fe241ca9ede9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469104/normal_600df430979b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_63b2517f2335407eb5016161cf0d8ff7.pdf?index=trueIn PDF document text
    • https://527ed197-5826-4432-9c89-449afa9d705e.filesusr.com/ugd/65ef70_961128f0fccc4d2996a514e4392e2382.pdf?index=trueIn PDF document text
    • http://ranitirunom.myartsonline.com/adrienne_rich_compulsory_heterosexuality.pdfIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_b91e26bd40f94a4ea8eb216024e613b7.pdf?index=trueIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_5a6957fb1be4482bad32bf5bac651896.pdf?index=trueIn PDF document text
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_605daab1181e4297a2803f10a0259a11.pdf?index=trueIn 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_off0000f1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B0 4936 bytes
SHA-256: 84ce96ededd8a3b6bd906868b672cd722dcfddb76f05c0fd716c2a77a6c14181
font_01_sfnt_off00010280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10280 11044 bytes
SHA-256: 24195815096fde7d43c3ea51c593d19e68c0793da2c9ad1052d32064e810279e

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