Malicious PDF — malware analysis report

Static analysis result for SHA-256 807fd75d7351cf7b…

MALICIOUS

PDF

73.3 KB Created: 2021-01-09 21:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a0be2e0adddf2b94386b704059ae99d5 SHA-1: 1d4c5bda9e078dfadce0500731912ea0e198c641 SHA-256: 807fd75d7351cf7bcbacbbffaf9dfaaa43274be9d7c609650e804c2db1673c38
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. The presence of embedded URLs suggests an attempt to redirect users to potentially malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=depeche+mode+a+broken+frame+album+cover PDF link annotation
    • https://cdn.sqhk.co/jibenapola/kphfhei/superhero_costume_creator.pdfIn PDF document text
    • https://site-1174122.mozfiles.com/files/1174122/thoroughbred_christmas_lights_directions.pdfIn PDF document text
    • https://xizuxikeg.weebly.com/uploads/1/3/0/7/130740292/24d12af6a026a.pdfIn PDF document text
    • https://mulelene.weebly.com/uploads/1/3/4/4/134440938/dalunepokusut.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/supefujoxopubu/fexiragoxijezuxaxikufa.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/alliance_quest_guide_vanilla_wow.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/aviva_company_email_format.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/the_righteous_mind_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/the_famous_unknowns_band.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/bronchial_asthma_review_article.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/38255969081.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/49608092129.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_off0000de69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE69 5480 bytes
SHA-256: 92ce8ab74ee8f79e53709e6e70a988ba873a098f11f54e1c77bc4dec9123c166
font_01_sfnt_off0000f0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E5 11124 bytes
SHA-256: 838f9527e075cdd0b2d7a1686abc63b2b49b930c358a767cc688a3b3d650be37

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