Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7a2962cf6f13ea…

MALICIOUS

PDF

73.3 KB Created: 2021-10-19 00:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8a3d10fb7176f42ab3869d8d8701c4a8 SHA-1: 0c81f0e26e9aed7b032d73b47a3c52a771ca8fe0 SHA-256: 6d7a2962cf6f13ea6b233870511cc12eebc7f586475ef07288bedba77cdb9d85
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The presence of numerous embedded URLs, many pointing to disposable domains, strongly suggests a link farm designed to redirect users to potentially harmful sites. The document body is heavily obfuscated and contains no readable content, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 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 http://lyzph.com/userfiles/file/Fl202109091926553353.pdf In PDF document text
    • http://sushimura1.com/uploads/files/sulevifone.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/najegivin.pdfIn PDF document text
    • https://gres-k.cat/userfiles/file/bomomepogal.pdfIn PDF document text
    • https://novitas.ro/files/53173542279.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/59701039446.pdfIn PDF document text
    • https://arerp.kr/data/file///18119046940.pdfIn PDF document text
    • http://iviltra.lt/images/files/kabefiveniwe.pdfIn PDF document text
    • http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/93303444222.pdfIn PDF document text
    • http://springgalleryng.com/Images_upload/files/53540615263.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/30344382521.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/vubiwubuluwil.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/givovuxejujijebod.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/bajuguwizazib.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616de44b946d5---venuwulufilotubunerixik.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/66480620565.pdfIn PDF document text
    • https://kor.mycultureis.com/FileData/ckfinder/files/20210928_25618228AE6535F2.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/dajadeb.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161386ce0808e5---88262356320.pdfIn PDF document text
    • http://104450wp19.agentcentrum.com/userfiles/files/ruxovuliwo.pdfIn PDF document text
    • https://planningpvedh.nl/ckfinder/userfiles/files/judupogofokizel.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/21253899857.pdfIn PDF document text
    • http://gekon.net/userfiles/file/63084266037.pdfIn PDF document text
    • https://clubharison.com/userfiles/file/46724444739.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/tgwjJlsMqHc/uplcv?utm_term=propiedad+conmutativa+y+asociativa+de+la+adicionPDF link annotation
    • 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_off0000bb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB72 10956 bytes
SHA-256: d1baaa2633867da788af1a00b12ba67bd792f6db49c25da8bd8bc3bdc2c92ae1
font_01_sfnt_off0000d4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D7 16940 bytes
SHA-256: ae050d4ecb1f508b9079e44d9b94ab85e9d69f9e95d60d1bf60c9384991f8bc0
font_02_sfnt_off0000ff25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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