Malicious PDF — malware analysis report

Static analysis result for SHA-256 964998d597ec0474…

MALICIOUS

PDF

71.3 KB Created: 2021-02-15 16:13:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b6ef09c4fc97023a9994336f2b2241b1 SHA-1: 7e6e182444fe2a8545d7ff263e8dcec5e448be11 SHA-256: 964998d597ec0474e95fb48b3c997f66bd5460bfcd10e9614b6cb94c9caaf414
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, and is detected by ClamAV as Pdf.Phishing.Trojan. The file contains a link farm with numerous external URLs hosted on disposable domains, suggesting a phishing or SEO manipulation tactic. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, indicates potential for further malicious actions such as downloading additional payloads.

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://leonvi.ru/strik?utm_term=disney+world+parade+2020 PDF link annotation
    • https://xuwomiber.weebly.com/uploads/1/3/0/9/130969046/xigonasojer-fifafapu.pdfIn PDF document text
    • https://memuvarava.weebly.com/uploads/1/3/1/3/131384606/951b77db.pdfIn PDF document text
    • https://simalono.weebly.com/uploads/1/3/1/8/131856945/1dd0d1bc.pdfIn PDF document text
    • https://rukepeninosiwul.weebly.com/uploads/1/3/1/4/131406291/xebajilupesa.pdfIn PDF document text
    • https://gefizubumob.weebly.com/uploads/1/3/4/4/134473977/tifusidipowewu_vebozolewinuze_vigoxewaxeped_jilesilubeza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501383/normal_60143952032b4.pdfIn PDF document text
    • https://mixozanuzobese.weebly.com/uploads/1/3/5/4/135400893/46cd948229e2852.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/gdWCGeD/tie_things_together_synonym.pdfIn PDF document text
    • https://dexulana.weebly.com/uploads/1/3/4/2/134234773/ad9be73b266936.pdfIn PDF document text
    • https://poxesaxe.weebly.com/uploads/1/3/0/7/130738711/notumutor.pdfIn PDF document text
    • https://sevanilab.weebly.com/uploads/1/3/1/4/131437268/3210489.pdfIn PDF document text
    • https://kinigapiluxuke.weebly.com/uploads/1/3/4/8/134863840/f5d7cac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419451/normal_60222456cb11e.pdfIn PDF document text
    • https://kexekogu.weebly.com/uploads/1/3/1/3/131384418/194d6c6817fb340.pdfIn PDF document text
    • https://zanewodibamejat.weebly.com/uploads/1/3/0/9/130969445/rawixazenavoroz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479210/normal_6021bf2984343.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000da01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA01 5420 bytes
SHA-256: 402196ad421f4b774d222b9e3372593207e56957a6ccc60bb9c9b069067aa8ef
font_01_sfnt_off0000ec96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC96 10712 bytes
SHA-256: 5aca0435927705058b46d9c8c29ebcacc61c92354115714cadf6b346ba4b1e3b

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