Malicious PDF — malware analysis report

Static analysis result for SHA-256 1174fb4594e9f95d…

MALICIOUS

PDF

71.7 KB Created: 2021-01-08 03:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5896a1ae65bf77375c3f22e15e18ef69 SHA-1: ca7de1918e5c969e4a6544b9de30f6a3d36c82e7 SHA-256: 1174fb4594e9f95d7633a1901665132c0966e56e64997e3014afc738774faabc
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 significant number of external links, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. ClamAV detection and ML classification strongly indicate this PDF is malicious, likely a phishing or trojan delivery mechanism. No scripts were extracted, but the presence of numerous external URLs points towards a phishing or SEO spam attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=sumter+national+forest+weather PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420039/normal_5fbd63880b01e.pdfIn PDF document text
    • https://cdn.sqhk.co/pipezifiwip/hchifsh/video_player_for_pc_xp.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/ihiiieb/22569801010.pdfIn PDF document text
    • https://cdn.sqhk.co/dimasemi/9jchbDh/15242849442.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f8851d88e8fc.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/3idKAh9/65459001816.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/eDomtgg/zombie_war_full_movie_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_5fd6c94d7dce7.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/6hcFb0c/gexigadavajerududim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383922/normal_5f9e67fcd21d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491671/normal_5fc6b71e8fac2.pdfIn PDF document text
    • https://ginijamuda.weebly.com/uploads/1/3/1/4/131409148/9781b1c85af336.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/OgiQGmX/paruwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e71d053d-840d-4f08-8059-2caf2de25998/gopro_be_a_hero_campaign_analysis.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_off0000da5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5A 5204 bytes
SHA-256: 69c644d6379e1b29cee80ac9e7068d7e26c18d443d17685d0280e431e1c8db1d
font_01_sfnt_off0000ebeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEB 11292 bytes
SHA-256: 038eb8f75a08cd37c5d88ea3b51bef28dbb76f0eb541820d9fdd43bf24990e84

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