Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0e8ed26c61cadc…

MALICIOUS

PDF

56.8 KB Created: 2021-09-10 09:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7066f2a5a5591d951164d12108858202 SHA-1: eb41b4ad2e9020f0589b4aeb57cf2b970c75edf4 SHA-256: 3d0e8ed26c61cadcbdeccf736c97fa1d344050ec5665d62529a5dcded88c4fd2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs that point to a link farm, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates these links are on disposable hosting, further supporting a malicious intent. No scripts were extracted, but the structure and embedded URLs are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7108

Heuristics 4

  • 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
  • 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://wieswioska.pl/userfiles/file/17354078484.pdf In PDF document text
    • http://aaronandanthony.com/userfiles/files/fujijinuwikovuladif.pdfIn PDF document text
    • http://gelinyuanyi.com/upload_fck/file/2021-9-5/20210905130155320919.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/66255924697.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/renededupufipoxitosured.pdfIn PDF document text
    • http://elskenecologie.nl/files/67499280154.pdfIn PDF document text
    • https://gkatsov.com/userfiles/file/pisawezawax.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdc7bd9e9e---lurupakuwidekubuku.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/12719723794.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/36676707876.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/65075753258.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/86517815347.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/sunasevi.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/b5bd711517745ae0050503d0b07e4d04/jitajafex.pdfIn PDF document text
    • https://mimpishiodua.com/contents/files/pewulixo.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/80872515782.pdfIn PDF document text
    • http://ndt-ultratech.com/files/2166462764.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/70522654834.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/58905682695.pdfIn PDF document text
    • https://aneri12.eu/res/file/baxivafavo.pdfIn PDF document text
    • https://vicareyou.com/userfiles/file/menugu.pdfIn PDF document text
    • http://begues.mobi/userfiles/file/33476164851.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/1422720556.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/pusuzogajenugaxofofugura.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/begenufabojemod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+psychology+of+money+morgan+housel+pdf+free+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB77D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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