Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32f0c52f49fcdb6…

MALICIOUS

PDF

43.5 KB Created: 2021-03-16 13:34:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66e3f24fcd041fd65ca1173a4b0bad96 SHA-1: 5892ef48053fe4dcd36a3843bbef9528da2883cd SHA-256: e32f0c52f49fcdb6ec79d93de4397552a98c0e3fe88fa277a3db13829723cf0d
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous external links, suggesting an attempt to redirect users to malicious websites. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a keyword search, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7498

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 43 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://fokemale.ru/award?keyword=calculus+3+problems+pdf
    • https://static.s123-cdn-static.com/uploads/4373502/normal_5ff339a410bee.pdf
    • http://photoforce.ru/zagg_folio_tablet_keyboard_case_for_ipad_air_2nqxob.pdf
    • https://tejegedalozo.weebly.com/uploads/1/3/4/8/134870252/napozokatas_bizepuwevobal_nidizotu.pdf
    • http://prizinsta.info/casio_sgw-1000_battery_replacementtvpkw.pdf
    • http://wowitaly.pro/helicopter_crash_body_remainstbm3a.pdf
    • http://gatorama.fun/how_to_use_kenmore_90_series_washeroigum.pdf
    • http://milansit.space/22505349006vrpv2.pdf
    • http://domavera.ru/29540515572al3f9.pdf
    • http://sallely.xyz/academic_english_vocabulary_listfwxqg.pdf
    • https://nofefikow.weebly.com/uploads/1/3/4/5/134510094/5aeaf7b5.pdf
    • http://devgm.design/66070948824tpoib.pdf
    • https://jinunezig.weebly.com/uploads/1/3/4/3/134308797/f4c696538e79.pdf
    • https://cdn-cms.f-static.net/uploads/4368788/normal_6025cfffdcdcc.pdf
    • http://triple-doska4.club/xalibibuzz61he.pdf
    • https://nevomunetis.weebly.com/uploads/1/3/0/7/130740414/5127d1cff84.pdf
    • https://tapizijivuvol.weebly.com/uploads/1/3/2/6/132696465/sinakofakob.pdf
    • https://tarutugiwom.weebly.com/uploads/1/3/5/3/135326066/jowezom.pdf
    • https://tetejinuditobig.weebly.com/uploads/1/3/5/9/135973847/zepujipofe-sogex.pdf
    • https://kezunegewekal.weebly.com/uploads/1/3/1/4/131483031/wupikiwepija.pdf

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