Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd12c98e68b023be…

MALICIOUS

PDF

74.3 KB Created: 2021-04-06 20:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a9f4aa66a710036b63766ff943538571 SHA-1: e2a64ed725b704ba553f5e6a889e95436a9fe04e SHA-256: dd12c98e68b023be8a3efc64ff6aaff06d7a5444f6ad54fec0f4f88e923ca65c
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on 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. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/strik?utm_term=what+is+a+reproduction+of+a+painting PDF link annotation
    • http://fepenikozi.22web.org/32086007891.pdfIn PDF document text
    • https://fokutape.weebly.com/uploads/1/3/2/8/132814024/5c1b4acbd06a.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/social_media_marketing_for_beginners_bookt377g.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/mariah_carey_merry_christmas_zipo6xud.pdfIn PDF document text
    • http://segway-wheelchair.ru/72809074544goy8z.pdfIn PDF document text
    • https://fatilisuwojumo.weebly.com/uploads/1/3/4/6/134652656/sofaporonukemewe.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/pizekegu.pdfIn PDF document text
    • https://zovipimisog.weebly.com/uploads/1/3/1/1/131163747/01661fd.pdfIn PDF document text
    • http://iglivesupportteam.com/mezamedixijedudebuw74i4v.pdfIn PDF document text
    • https://jeputuzomum.weebly.com/uploads/1/3/1/3/131398597/2617227.pdfIn PDF document text
    • https://figovuliwa.weebly.com/uploads/1/3/4/4/134476313/7931952.pdfIn PDF document text
    • https://lefatelaxebaj.weebly.com/uploads/1/3/5/3/135398996/1627c6f4d6d0.pdfIn PDF document text
    • https://xizidalubatud.weebly.com/uploads/1/3/4/5/134583516/badelolol.pdfIn PDF document text
    • https://vijunefuk.weebly.com/uploads/1/3/4/5/134588972/f478486.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_786bb9b111b14a6ebbc246ec54472bbc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a9bb7b-1fe7-4ad1-878c-f6e1da0d9201/debudutepiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7701bc98-a636-40a0-bde8-f486577a6f54/what_is_anthropology_culture_area.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10594ddf-16e7-4c53-ab6d-192d32291cf8/16117146850.pdfIn PDF document text
    • https://d8aee3b0-83ea-4a0d-b8f9-524a85b41d10.filesusr.com/ugd/105b34_81e4ea1d9b9e47ab94beea75130865e7.pdf?index=trueIn PDF document text
    • http://sugorotebego.epizy.com/65622259011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f0c0df7-e0b8-42a0-acd6-48a7238c4719/87413328431.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_off0000e6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DF 5396 bytes
SHA-256: 76a19a51932d211ae1aa3ff3c0ff360d2d12ff80d33d81f324f6b072f40c0424
font_01_sfnt_off0000f946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF946 10140 bytes
SHA-256: 83116fa85a75e3f9de8b49a34b115a7adf94b818eb022abf651c6e2ffde9dba2