Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a8cc944d2eabf3…

MALICIOUS

PDF

85.9 KB Created: 2021-09-22 12:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1669ea92d2efea6446dc89a97afad194 SHA-1: d9aba387636b6027367a596180313e3431c5101f SHA-256: f0a8cc944d2eabf3f21687ffa6d35b62aed5cc4a78e7d45102a967bbe2917c82
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6959

Heuristics 4

  • 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
  • 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://dsacare.com/admin/uploads/file/16084568441.pdf In PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66782595100.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/88340888205.pdfIn PDF document text
    • https://areicon.com/images/file/zisiniwidezigonava.pdfIn PDF document text
    • http://proficlim.ru/public/userfiles/file/16878218208.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/66588708286.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/s35e2rv7ch99vl5f7b49d18vo3/35577740467.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/92210420121.pdfIn PDF document text
    • http://xedaphcm.com/luutru/files/nixajewapuwe.pdfIn PDF document text
    • http://euromarkcreations.com/new/fck_img/file/23127984347.pdfIn PDF document text
    • https://regiefranchet.fr/userfiles/files/guruwatanidiza.pdfIn PDF document text
    • https://lombardpruszkow.pl/local/userfiles/file/80229454746.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/xejowesomerurodu.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614acbeb23502---nujizumemudelokek.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/sudazubeki.pdfIn PDF document text
    • https://masukpt2.com/contents/files/nipuxudumoluvutekujaza.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021092017480473499.pdfIn PDF document text
    • http://tg-focus.ru/userfiles/files/47636120084.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/jejijozigeselezolasejaz.pdfIn PDF document text
    • http://bangtutrang.com/upload/files/69009629432.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/fewusatojizididomo.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/kibenotabujabanifirax.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lakare.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/gupuse.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/38892019578.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=life+is+beautiful+movie+streamingPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11692 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA4 18012 bytes
SHA-256: a08c1229a2be8003a0b84d5809ccfeeb003a404c47adafffff9f2c88faae58b4

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