Malicious PDF — malware analysis report

Static analysis result for SHA-256 11202ffc00d49d19…

MALICIOUS

PDF

74.9 KB Created: 2021-09-22 19:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2a286e5587872ab1bc6ce2a017071cf6 SHA-1: 94d0b9e002479093799f52cabc3d0c4c5699a690 SHA-256: 11202ffc00d49d1947f15d65c9525ad1b60a30ceb4b4cc0218974bf58261fb1c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically identifies this pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7259

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 https://nomylo.ru/uplcv?utm_term=what+do+you+use+to+make+potions+in+minecraft PDF link annotation
    • http://anais.terminarz.online/kosmetyczka/krakow/files/48443018258.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/sipamunelo.pdfIn PDF document text
    • http://library.nesdb.go.th/ic/admin/ckfinder/userfiles/files/varuwazof.pdfIn PDF document text
    • https://aathichudi.org/userfiles/file/kogagozobepegonumajaw.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/gogofuw.pdfIn PDF document text
    • http://dealershop.es/camarasegovia/userfiles/file/mosix.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/96554367837.pdfIn PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/tupevi.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/memetowerudulanaviruta.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210906_091332.pdfIn PDF document text
    • https://hse.tw/upload/file/deguri.pdfIn PDF document text
    • https://demo.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/14497402541.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/161481657478c5---82689727218.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/zodulelitaxapixemadod.pdfIn PDF document text
    • http://innotack.com/userfiles/file/xudumen.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/68641317372.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/23320612545.pdfIn PDF document text
    • 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_off0000d35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB76 11140 bytes
SHA-256: 2f04b1d4bce3fe66cdf1911fec54972360088306fb8af40dfa5881720e411480