Malicious PDF — malware analysis report

Static analysis result for SHA-256 729d615c2ce405ef…

MALICIOUS

PDF

80.4 KB Created: 2021-02-09 19:12:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d28a0540f4ce806c4268a8dea38b5506 SHA-1: 4fb11b07b5bf661b3af47346d8c0360d294d1b9b SHA-256: 729d615c2ce405ef847a3cb059c58b35df5d48046fa190751fa6f4cec8697664
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating it is part of a link farm designed to direct users to various websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://leonvi.ru/123?utm_term=sapphire+dragon+miniature PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416131/normal_5fed466d9c9bc.pdfIn PDF document text
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/bbe1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485705/normal_5fdbb0f3b42b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483082/normal_5fd08f4546756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416671/normal_5fe9acf291219.pdfIn PDF document text
    • http://sportita.fun/52990270794s14ki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_6013a3489b35c.pdfIn PDF document text
    • https://liloxowilobo.weebly.com/uploads/1/3/4/2/134265539/xemuwoxukexad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465151/normal_5fc9bfb47975a.pdfIn PDF document text
    • http://thechambre.xyz/tedonohupyl.pdfIn PDF document text
    • http://strapslap.online/vefajipogobidakowekawufaf9gb4a.pdfIn PDF document text
    • http://blankid.ru/whatsapp_messenger_for_blackberry_bold_97806r5hl.pdfIn PDF document text
    • https://senajadodum.weebly.com/uploads/1/3/1/3/131379015/9727814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474231/normal_601a9e3a29f56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456372/normal_5fdaf6ff8882c.pdfIn PDF document text
    • http://ewop.space/aws_elastic_beanstalk_tutorialgjyd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470027/normal_6019038a7f78d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://litopuputorer.rf.gd/kathi_sandai_movie_songs_starmusiq.pdfIn PDF document text
    • http://kuzebelinebofe.epizy.com/gonococcal_urethritis_treatment_guideline.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_off0000f9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EE 5264 bytes
SHA-256: 2ab9ee0409e18e48fd133572c07e05a68a82ab0c6e7c4364a6f95aa173189575
font_01_sfnt_off00010bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAB 11912 bytes
SHA-256: bb52ed2f9d010394f4937d707751f239afa6a1f3cd0167214e68f0d54c14e728

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