Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9df32996a1d6226…

MALICIOUS

PDF

80.9 KB Created: 2021-09-18 20:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b7926d9c467fc8400690a57f80c06682 SHA-1: b94771ceaf555a2a5f50d1c471033080801ad2b1 SHA-256: b9df32996a1d622647afdd866745f0349013adfd1eab24457c70ede070b04bae
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/23073192083.pdf In PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/foziporidudopurar.pdfIn PDF document text
    • https://titishop.co/upload/files/rabak.pdfIn PDF document text
    • http://www.vishalsahni.com/public/ckfinder/userfiles/files/lunewimefopalu.pdfIn PDF document text
    • http://galettedesrois.eu/userfiles/file/1556354807.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/fepibazivunufipigamezi.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d8a0fd16541334206e7d9fda2b91f5b9/25824846326.pdfIn PDF document text
    • http://www.asiacoservice.com/file/files/suxaserojupaxizebodixipur.pdfIn PDF document text
    • https://icnj.net/ckeditor/ckfinder/userfiles/files/jaxitapulelosexuzusera.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/99160160689.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/97633622535.pdfIn PDF document text
    • http://japanbizkorea.com/userData/ebizro_board/file/xurovorupuloxadazoxim.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/xazezesagejogamudibikozig.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/39313536554.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/27219116123.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210906131113_748878959.pdfIn PDF document text
    • http://fcgo.tw/uploadpic/files/rajeko.pdfIn PDF document text
    • https://ladida.asia/sporlegen/administrator/imagetempfile/kevivalawopijadapa.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/6706813015.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/63743356262.pdfIn PDF document text
    • https://greenways.at/userfiles/file/rifewevitoderiruxuzuj.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/97c72997ba63b3990d07f0ec5dcdcd5b/wukamedojilakutedus.pdfIn PDF document text
    • https://vsevolozhsk.mebel18.com/uploads/files/bonaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=sonic+runners+apk+offlinePDF 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_off0000d5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A6 18368 bytes
SHA-256: 0ed9ac247476526dab5b106c5b3f50aa051035e6a7ef4a47d292849bb61ce4db
font_01_sfnt_off00010578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10578 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8F 10644 bytes
SHA-256: 962f1ef5e4fb73400e62d3fc60e38fba234b1b0781d08747029a474c9c4e9bfb