Malicious PDF — malware analysis report

Static analysis result for SHA-256 580e32de04c3ccbc…

MALICIOUS

PDF

74.9 KB Created: 2020-11-14 01:32:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8a9ea1d39de1ec722271894e800eed22 SHA-1: 901d56bc55954f97ce900e727737898100a5eba3 SHA-256: 580e32de04c3ccbc77243a56a87d54aed82bdb7b38115425a33c43d4686568a9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards malicious content designed to redirect users to potentially harmful sites.

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://trafftec.ru/123?utm_term=baloo+training+manual+2015+pdf PDF link annotation
    • https://tewodoxes.weebly.com/uploads/1/3/4/3/134368692/vitomajovu.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/gilamurolopek.pdfIn PDF document text
    • https://jemajodelevo.weebly.com/uploads/1/3/4/3/134394711/5330996.pdfIn PDF document text
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/8297942.pdfIn PDF document text
    • https://murenazomof.weebly.com/uploads/1/3/4/0/134012525/gitusinasomo.pdfIn PDF document text
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/tirosululonowebipupe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/77532073613.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/csi_bridge_superstructure_design_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/60043867719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/113e4875-49c0-4181-863b-318eb3f58435/36489419004.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/vietnam_war_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/worksheet_7._6_comparison_of_equality.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3af18451-f9ed-4ce0-936b-11de14a8f8e4/mic_not_working_in_vrchat.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/20476353935.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD883 5448 bytes
SHA-256: f586b20f7a5f358256f3d6b84756b37e08c3e7b7e3fedf29c6224f1c1df5b1c8
font_01_sfnt_off0000eae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE8 10944 bytes
SHA-256: f37cf196188e1ee79a9c9ca78cd520bad90dde64e65e7bfe9e6809874b35488d
font_02_sfnt_off0001102b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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