Malicious PDF — malware analysis report

Static analysis result for SHA-256 7013b8590f343383…

MALICIOUS

PDF

78.0 KB Created: 2021-09-14 01:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 75c78c420596cfb96cd61566f465a171 SHA-1: 0f1ec6c194b3be4511808724d432c0b2c748ae7d SHA-256: 7013b8590f3433833cd7ea264f52b2c4826dd534576a9d993adc8771aa4065a4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of numerous links, many on disposable domains, and a heuristic indicating urgency lures suggests a phishing attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pastelbuilders.com/userfiles/file/xavizibiregidunobavo.pdf
    • http://zulassung4you.de/bilder/file/83213442883.pdf
    • http://cassotech.nl/site/data/ws/files/rafuvegenimesezilina.pdf
    • http://soundspace.eu/Upload/file/55391796739.pdf
    • http://zulassungsdienst4you.de/bilder/file/dorezamizutinevalebixe.pdf
    • http://bjdfszwy.com/filespath/files/20210914002452.pdf
    • http://sgd42.ru/userfiles/file/23419147429.pdf
    • http://uptownchantilly.com/uploads/files/wukaxilutasafa.pdf
    • http://buren-kompanie.de/userfiles/files/22403865685.pdf
    • http://mdsalon.ru/img/lib/file/27869576803.pdf
    • http://an-ocn.ru/ckfinder/userfiles/files/gamugoxuninodag.pdf
    • http://hatdesechia.com/storage/ckfinder/files/guranififixujigorixe.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/5qsth3v53178otkmrbv14jrrqg/fagofalugegatisuvalukef.pdf
    • http://blccy.com/userfiles/files/dudebelam.pdf
    • http://studiomilano.eu/userfiles/files/mavefikenimalat.pdf
    • https://liepasmuiza.lv/userfiles/library/vinajevewupamaxafuxebuma.pdf
    • https://trinityautorepairs.com/uploads/files/848019409.pdf
    • http://akvari-um.ru/userfiles/file/malubaxaxelevisovavemalof.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161306abbed2c5---13599569993.pdf
    • http://partnerplus30.ru/images/fornews/files/kopenowasenawopakuzodibaf.pdf
    • http://glampingcaravan.com/userfiles/file/20210904000104.pdf
    • https://blogsma.com/files/larod.pdf
    • http://erh-hu.com/userfiles/file/xepen.pdf
    • https://5ky13lu3-1251.com/contents/files/zubediwimati.pdf
    • https://granitabrasive.ro/editor_up/paburejenonuxomolijox.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=pro+inshot+app+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc88.bin
5fce34e4a86ab3537d7fa8ad4a16ae9d0db1d5f6f99a741f47c2025f4c982e97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC88 10444 bytes
font_01_sfnt_off0000e429.bin
9cee56488c22f57285adc8eaac17163d652a1e1f4b85e51ea53d7b1ef8380646		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE429 17700 bytes
font_02_sfnt_off0001129c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1129C 16792 bytes

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