Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a446df88ada97b1…

MALICIOUS

PDF

72.4 KB Created: 2020-12-23 00:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b9643362ae82e588230f622e35ec7428 SHA-1: 87b32b4940120e1972efd65bdc1a2544e8e4e55e SHA-256: 6a446df88ada97b1025aaf5064bec1b7e54fcfc7a23ba03f12300ac2a1630374
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The presence of a link farm with 28 external PDF links suggests an attempt to obscure the final destination or to distribute malicious content broadly. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=epic+systems+break+the+glass In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459318/normal_5fa2d51beef16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427828/normal_5fd7c2400d7bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_5fbdf918ec429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f881e4bb9872.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371020/normal_5fdf81561cfa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384645/normal_5f956a908020e.pdfIn PDF document text
    • https://susemozud.weebly.com/uploads/1/3/2/8/132814624/pofafejopo_fixixodugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470211/normal_5fd0d704d7f4c.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/5b248a6.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/davawina/71046821860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e07dc1-1678-490b-82de-5e60261bb708/xuwija.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/ingenuity_inlighten_cradling_swing_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/foratulelinutibuwugu.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/the_social_animal_by_elliot_aronson.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7E 5612 bytes
SHA-256: 5633eb956c7461617798c9acfcac0d0781b82a00c44ac46cb69be44b22d7d553
font_01_sfnt_off0000f172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF172 10432 bytes
SHA-256: 7c9c0170b6fd1d706bfe05422a6c599efbd850814156a5d949eac9319feb10c7

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