Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce03ce4a4ade15c…

MALICIOUS

PDF

77.3 KB Created: 2021-02-19 05:31:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: fddf541b0cafe303d7e0a33afff6b819 SHA-1: 6aedb059e249677df79201f796a2ea1daaffe2d2 SHA-256: dce03ce4a4ade15c810adf6c32792040c68a367dd5b1c5a096945c74ff9e5637
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious sites.

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
  • 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://leonvi.ru/strik?utm_term=nissan+forklift+parts+dealer+near+me PDF link annotation
    • https://cdn.sqhk.co/dolafita/WXhij4k/dragon_pet_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/GjjIfja/marktplaats_belgie_auto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444092/normal_5fdfc04a5b3f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387430/normal_5fdfba865ad0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449599/normal_5fd2968c3d462.pdfIn PDF document text
    • https://garisufusomepis.weebly.com/uploads/1/3/0/7/130740000/71a246.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374542/normal_5ff32800cd662.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/ifigTmb/dekuxiropagizuvesapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463794/normal_601ad4c378488.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/OwUFsjh/tarot_cards_around_me.pdfIn PDF document text
    • https://gagejewepaji.weebly.com/uploads/1/3/4/4/134444149/lavokab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374189/normal_5ff8331426fd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387716/normal_5fef9cc40bd4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385863/normal_5fd2514a13309.pdfIn PDF document text
    • https://cdn.sqhk.co/tusadopovet/ij7Vzha/lepof.pdfIn PDF document text
    • https://sorawujij.weebly.com/uploads/1/3/4/6/134671526/gojudegagipejevar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489042/normal_6015de6356bab.pdfIn PDF document text
    • https://vebavorosufate.weebly.com/uploads/1/3/4/7/134742301/c5bc45dd00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21B 5220 bytes
SHA-256: 28fad851c204cb6f98050eb8e41e1ab578b66fec0b81544f747a1025d4132c4f
font_01_sfnt_off000103d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D2 10460 bytes
SHA-256: 27d51a4dc08c8059a766803c4f25eb272b7b2e33e80d42a2e49c1c9123fd534f

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