Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6c034967bad41c…

MALICIOUS

PDF

89.5 KB Created: 2021-09-20 14:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a1cc4dfe93528d28677eceac0e7ac55b SHA-1: 01c2244f9db7e602fbd7035d8345d197eb1f80c1 SHA-256: ed6c034967bad41c17da443396d5d1da966414d27a64d78143a8bbc56f2d0026
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, containing numerous external URIs pointing to potentially malicious domains. The document body is unreadable, but the presence of many links suggests an attempt to direct users to external sites for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 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://archism.ru/uplcv?utm_term=lagu+panda+desiigner PDF link annotation
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/2mr1opv6id0dur13l4c8dp5ll4/fajuvimokuxeluxixox.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/83478286281.pdfIn PDF document text
    • http://demkapi.com/resimler/files/fupenur.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/takemugepomen.pdfIn PDF document text
    • http://psychologadamczak.pl/userfiles/file/zilagiwolezukuz.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/8889090180.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/14410164462.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/64018220063.pdfIn PDF document text
    • http://sinocelltech.com/filespath/files/20210912075730.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/56734894455.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/wekemapikuwujoximo.pdfIn PDF document text
    • https://mavibusiness.it/file/69812301677.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/wotamejonigugorewilazu.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/7555865105.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/12675111615.pdfIn PDF document text
    • http://effekt-film.de/files/file/73122153128.pdfIn PDF document text
    • https://baglab.pl/galeria/file/7245310051.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/tizomazonitikawofewilijir.pdfIn PDF document text
    • https://cansandientu.net/Images_upload/files/didexoreboziwov.pdfIn PDF document text
    • http://fst-uinsu.net/userfiles/files/zipesozige.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/wepevurerifefomij.pdfIn PDF document text
    • https://kawanmto.info/contents/files/gezevarevufoxaxekesumaner.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/gutenawadudozop.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 20152 bytes
SHA-256: cd25c601e82b3d7326a2a52b8ceccc7a4609cd9e3de7db7503df35916849d953
font_01_sfnt_off00012970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12970 10360 bytes
SHA-256: f8596ad87a3adf897580d1a179ea58bd2819c6718cdfbed9c8af2c488666dd53
font_02_sfnt_off000140b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1