Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c7a5dac5c5168a…

MALICIOUS

PDF

64.0 KB Created: 2021-09-28 03:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e20087dc8e36c614bd82b2fe186549c5 SHA-1: 8c3a86cdf1ddaa5f8a4efcc5b9b1029e653fecb6 SHA-256: e5c7a5dac5c5168a8aae65ec7b6d7a345aa0d0c78bfc209b71b1b947a49cd053
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicating a high number of distinct hosts, suggesting a phishing or malware distribution scheme. The presence of external URIs and the nature of the heuristics point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5661

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 https://bloomlight.pl/_bloom/file/74890635705.pdf In PDF document text
    • http://truhlarstvisollner.cz/data/file/53311469690.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/6e126bcf76a6654ea81537e9a011bb78/42093885532.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/kofeteziguvu.pdfIn PDF document text
    • https://bawauang.com/contents/files/nidekoxirimoviminejamexij.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/sinobipetubanozejexuruk.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/soduju.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/19284576789.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/40187602720.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/37151584752.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/samopujobugazojapetizawot.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/a4cef410dfe744b4f0366e9115df6ecc/sebawaxefutizidimaworade.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/62595694292.pdfIn PDF document text
    • http://www.focitabor.hu/userfiles/file/mitedibugobofaluno.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/87321155776.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/gelalipitezirixatawadomaj.pdfIn PDF document text
    • http://kleinschadenexpert.com/userfiles/file/nefimutulazawawobad.pdfIn PDF document text
    • https://photojet.bg/userfiles/file/49309682178.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/riwemazibalozemosarup.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/70488294564.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/ruporibidew.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/84843379366.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/pateb.pdfIn PDF document text
    • http://nomaquito-travel.com/editor-images/jolenujunijigagisek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=video+to+music+converter+apkPDF 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_off0000b313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB313 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2A 10856 bytes
SHA-256: b1f3f850d0c1b67697a76a0293a302eba6185bd8446c4c55d1aadcee41a99775