Malicious PDF — malware analysis report

Static analysis result for SHA-256 5afe867e41eabe40…

MALICIOUS

PDF

75.7 KB Created: 2021-03-15 16:20:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a92603d53b22ab269eea26e954195fc2 SHA-1: 9038d0cbd3a6cbe209216db29ad3b3a8d0671cee SHA-256: 5afe867e41eabe4017b1c632368fb0a285dd237ec21302045f08c2274a9d54d6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=esperanza+renace+movie PDF link annotation
    • https://redewude.weebly.com/uploads/1/3/1/3/131379671/bunawani.pdfIn PDF document text
    • https://kakowafalajoji.weebly.com/uploads/1/3/4/4/134455686/jakometevutimujofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486745/normal_602887b8ad0cd.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/fuvisada.pdfIn PDF document text
    • https://pumelagu.weebly.com/uploads/1/3/2/8/132814433/6491797.pdfIn PDF document text
    • https://relitemora.weebly.com/uploads/1/3/4/3/134352419/538694.pdfIn PDF document text
    • https://pubegole.weebly.com/uploads/1/3/0/7/130739090/nedode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421787/normal_6019778473bee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375358/normal_5fcaad077a7f2.pdfIn PDF document text
    • https://nodopemewave.weebly.com/uploads/1/3/2/6/132682748/sojenorawati-xotevewe-ninalib.pdfIn PDF document text
    • https://fusesekomufe.weebly.com/uploads/1/3/1/6/131606177/e469df227.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460954/normal_5fcf098b65941.pdfIn PDF document text
    • https://biwewonopegad.weebly.com/uploads/1/3/1/3/131380063/ad82bc0d4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450721/normal_6029e8a864f3c.pdfIn PDF document text
    • https://movalolutipala.weebly.com/uploads/1/3/2/6/132681002/579693.pdfIn PDF document text
    • https://mopamosaxute.weebly.com/uploads/1/3/5/3/135322262/majelobij.pdfIn PDF document text
    • https://wawowipibi.weebly.com/uploads/1/3/3/9/133997364/bosomijajagisejexev.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/071514ad-b822-4322-8b82-f346a72ef07e/dyson_v8_animal_cordless_vacuum_cleaner_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbe05f76-03d8-4fbb-9bcb-56833d6cbb69/19990491142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85a8771-d88e-4719-9c48-35d61e3b039d/favonupalifuzuwarubi.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_off0000e81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81F 5116 bytes
SHA-256: 8c01279ba5726857b7d1c9da638e268868fb7b3651d10826ef9fac267871b65a
font_01_sfnt_off0000f97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97F 11400 bytes
SHA-256: 1cc30287ba2664244a4ab453d6fa62fdbba08b7bdd224f41ff8bce1676530cb8

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