Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5ac462c9b21c567…

MALICIOUS

PDF

71.6 KB Created: 2020-12-17 07:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ed4f2279c7f640ed08a9e3b2e8f2a603 SHA-1: e9edc48a7e0e184bf353e75d5fe19ae060b9e105 SHA-256: b5ac462c9b21c567708b94c8b2437a812b609a13ade70cb8da66591acbd47a6b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://traffmen.ru/strik?utm_term=nosotros+no+jose+bernardo+adolph+cuento In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403282/normal_5fb2d84b8b0ce.pdfIn PDF document text
    • https://lisamotakix.weebly.com/uploads/1/3/4/3/134308999/579242.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482849/normal_5fc73c4187592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f872cf137ef7.pdfIn PDF document text
    • https://vekukedabil.weebly.com/uploads/1/3/4/7/134710008/8689919.pdfIn PDF document text
    • https://sefokasezasun.weebly.com/uploads/1/3/4/6/134690402/lekexigufivo_wexuvavalep_tibuwatemavo_jebazutek.pdfIn PDF document text
    • https://juliraviwuziw.weebly.com/uploads/1/3/4/2/134267057/1743498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5fa45fc36cf78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5f9f05d0eb2db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465907/normal_5faba17af2b20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492278/normal_5fb351808568f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478134/normal_5fb2decbb057c.pdfIn PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/vusigo-tulurol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479451/normal_5fcab25b22f68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381737/normal_5fd93b455e7f3.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
    • 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_off0000cc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC31 5180 bytes
SHA-256: abe8d99507415260d47fd693add65aaaefe4b9656319f67eb295e2ad0bac2d76
font_01_sfnt_off0000ddc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC8 10992 bytes
SHA-256: 5b8cfd4931b1ca0a11ed79a56200b2f055a3ca2472346ba0a9b4f773d17cc721
font_02_sfnt_off0001016f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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