Malicious PDF — malware analysis report

Static analysis result for SHA-256 429a79d53f5bd487…

MALICIOUS

PDF

83.2 KB Created: 2020-12-16 02:09:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 376dfb3a8f7f545a7de005aaed8fb0ec SHA-1: 46a45a0e8702403ba5cb00371dbfa8ba8482f067 SHA-256: 429a79d53f5bd487dcf017f90e8b63a6a4abfb6d0bc5597f780487d22e3e137d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to phishing or malware distribution sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to external resources.

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://traffnew.ru/aws?utm_term=corrugated+asbestos+sheet+roof PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476758/normal_5fa6fe270512e.pdfIn PDF document text
    • https://jevilurusev.weebly.com/uploads/1/3/4/7/134749577/bofomaginulov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426688/normal_5fb6b0117d721.pdfIn PDF document text
    • https://zozufawagizawag.weebly.com/uploads/1/3/4/4/134454621/wejob.pdfIn PDF document text
    • https://xikematevi.weebly.com/uploads/1/3/4/3/134392378/5761808.pdfIn PDF document text
    • https://mozosuroje.weebly.com/uploads/1/3/4/4/134456199/pomimis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5fb72cb55db5d.pdfIn PDF document text
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/ab6928.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc345e6affbf90a66f9bf12/t/5fcd1d66978da30c5604331a/1607277927438/epic_seven_tier_list_melissa.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/information_about_arunima_sinha_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/49808953823.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/97743845427.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_off00010b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2E 5180 bytes
SHA-256: 16b9e0f159e3968437898bb18f232faaf463d80f8909dfe313ba009474d68bff
font_01_sfnt_off00011cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC1 10376 bytes
SHA-256: bbec0533179eb1a9cbe7a91f7cf896dbd35907c684d26ada3dbaa13ff04d0ad0

Open this report in the interactive analyzer, or submit your own file for analysis.