Malicious PDF — malware analysis report

Static analysis result for SHA-256 4349b2857f76151e…

MALICIOUS

PDF

74.3 KB Created: 2021-01-20 10:41:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5b73597ba3b7d7d42eb75c7f48c671fa SHA-1: fc09c8cb6bc4f6a0bb32fb728c88217a48005819 SHA-256: 4349b2857f76151e0d8a6ad9e1d552642dec7c5cd9944ffca9bd8c66acd78d08
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary URL being `https://seumenha.ru/aws?utm_term=hotel+brochure+design+templates+psd+free`. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded links suggest the document is 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://seumenha.ru/aws?utm_term=hotel+brochure+design+templates+psd+free PDF link annotation
    • https://natatujefeni.weebly.com/uploads/1/3/1/6/131607075/2802930.pdfIn PDF document text
    • https://jipunone.weebly.com/uploads/1/3/5/3/135349916/5355164.pdfIn PDF document text
    • https://cdn.sqhk.co/matelasoguje/geKghhc/near-_earth_asteroid_tracking_live.pdfIn PDF document text
    • https://cdn.sqhk.co/mudinaxape/2Mix5Cb/tukanexedikaza.pdfIn PDF document text
    • https://cdn.sqhk.co/vavusiwi/cihohbJ/pastimes_menu_baton_rouge.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/njiO3ha/60853344804.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/bIkWLjh/jurassic_world_alive_new_hybrids.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/Qznhdia/36341723180.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/79ajagh/magic_dream_tiles_descendants_piano_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/giihGia/jizubomud.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/7354327.pdfIn PDF document text
    • https://tezulitu.weebly.com/uploads/1/3/4/3/134316961/zizozimoz.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/jiGH6hd/50976614139.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/wlja3hx/beduwulosaxififefabo.pdfIn PDF document text
    • https://pekiwuvigefarov.weebly.com/uploads/1/3/4/7/134766825/b9eff.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/51X0fss/puzzle_dragons_anime_wiki.pdfIn PDF document text
    • https://luwusimoxoxaxa.weebly.com/uploads/1/3/1/4/131453453/072722929e.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_off0000e4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C3 5672 bytes
SHA-256: c48713cfe37bfc5456c55ac6ed343bd3fa474f64ae5722a5ec8ffbf2fedf47a9
font_01_sfnt_off0000f7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DA 10500 bytes
SHA-256: 3bafdc68cc151fe8750a29e5930a8a7fb189eb1c37ce6a01877dc751f6381317

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