Malicious PDF — malware analysis report

Static analysis result for SHA-256 380e164469703862…

MALICIOUS

PDF

68.0 KB Created: 2020-12-23 20:12:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 38e17c0d3509c6cd80ccd209aa70da01 SHA-1: d41bcf3751256ab6fffdd36d08c8afa6b5d1a8f0 SHA-256: 380e1644697038621234924a08787f7248fba60c2c37ac97e6f88837ad968cb1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document, likely used as a lure for further compromise.

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 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.
  • 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://trafffe.ru/strik?utm_term=adderall+side+effect+excessive+sweating PDF link annotation
    • https://fojifipavubi.weebly.com/uploads/1/3/4/6/134618349/ziluruxowub.pdfIn PDF document text
    • https://doxibizogo.weebly.com/uploads/1/3/4/8/134893922/nakez.pdfIn PDF document text
    • https://ziwugedaxuz.weebly.com/uploads/1/3/4/5/134501511/jegufotoxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_5f98554ca43c6.pdfIn PDF document text
    • https://rokolumer.weebly.com/uploads/1/3/0/9/130969153/8805766.pdfIn PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/lobow.pdfIn PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/7843712.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jevelel/fofakurokemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ad31f2-97f4-4933-b4c6-9db189c36565/94664010547.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/10357107979.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/the_new_weibull_handbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfce29c4-78ec-4777-9805-f740deb2d968/26802687261.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/lippo_karawaci_tbk_pt_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/29955088875.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_off0000cdce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCE 5396 bytes
SHA-256: 078524098a70f3fd56c87a1cd5cf0f63749d594b125cdb55c53dc4313ba3a6a4
font_01_sfnt_off0000e04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04F 10104 bytes
SHA-256: 2f20c3316a092d1d4785352a2b6fe5f45aa0138aa34fa64e2ea28ea364d270a7

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