Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f294f35d4f2000a…

MALICIOUS

PDF

82.3 KB Created: 2021-09-10 09:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a045a1d3d346962a3dd1b745405c2e20 SHA-1: ebb21e81fe53f302e46ae21f92d5b2625a85e207 SHA-256: 8f294f35d4f2000a28db82247f9335cdcb2cb1f0d74f2b03b159ec8052cf25c3
134 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to trick users into downloading further malicious content, likely through a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://2m-m.eu/userfiles/files/98984649352.pdf In PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c900109e2---29182149593.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/2732158884.pdfIn PDF document text
    • http://nenorm.com/files/files/gorezixux.pdfIn PDF document text
    • https://ms1oke.com/contents/files/daxoxogubuseda.pdfIn PDF document text
    • https://stop-remont.ru/ckfinder/userfiles/files/51810288653.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/gawesinap.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/pipiwus.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/42497777694.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/fapilolufur.pdfIn PDF document text
    • https://emailing-online.fr/uploads/userfiles/file/81494048764.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/kajuzatigolarilevuwonis.pdfIn PDF document text
    • http://dc-3ed4d7413bdb.prshots.de/uploads/userfiles/1630592177/files/meratidid.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/pakipunewajamowof.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/sixarugubetudimoxoto.pdfIn PDF document text
    • http://telecycling.info/files/file/zudagawiburu.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/rapobutabogep.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/monajiridipigevijupod.pdfIn PDF document text
    • https://desco.scp.hr/files/82261638718.pdfIn PDF document text
    • http://amicissiapiemonteisa.it/userfiles/files/42524278494.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/15916444249.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/galunimilofedaletaf.pdfIn PDF document text
    • http://efcosmetic.com/uploadfile/files/53914416951.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/wememilitowaneb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=monopoly+slots+free+coins+hack+2021PDF 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_off0000d8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D6 11068 bytes
SHA-256: 992a52d364c2885966eac95f293f1e25b94d701132577ad6d062f764774081df
font_01_sfnt_off0000f2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACA 18220 bytes
SHA-256: 739f70d4b5a13a7e532b1399fd388cc8660bb154a3fda4e092dcaa893bb3c5dc