Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8f49c4176f011c…

MALICIOUS

PDF

50.6 KB Created: 2021-02-27 10:29:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7db4d5e1782f08158cf36484b6165f8d SHA-1: b9152cd85acfb4d07a33e094dd7300d680eae6fe SHA-256: 5c8f49c4176f011c3440c714d4c52d3efb50ceba64b995dc16af93b045126311
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only document designed as a lure, typical of phishing attacks. It contains numerous embedded URLs, including one pointing to 'seumenha.ru', which likely serves as a redirector to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8547

Heuristics 5

  • 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 50 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://seumenha.ru/aws?utm_term=2+nephi+31+20+meaning
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/5575090.pdf
    • https://static.s123-cdn-static.com/uploads/4449771/normal_5ff329bc4c24f.pdf
    • https://cdn-cms.f-static.net/uploads/4465397/normal_5fdb25776a085.pdf
    • https://cdn-cms.f-static.net/uploads/4381344/normal_60209d5a37751.pdf
    • http://eduha.online/south_carolina_unclaimed_funds_websio75v4.pdf
    • https://static.s123-cdn-static.com/uploads/4506200/normal_600798d99a0c7.pdf
    • https://leguwilevifemat.weebly.com/uploads/1/3/4/5/134595517/e97fbdb.pdf
    • https://static.s123-cdn-static.com/uploads/4490123/normal_5ff0c80fed7c6.pdf
    • http://doweryklkq.space/charlie_chaplin_hd_video_songs2wprc.pdf
    • https://cdn.sqhk.co/dexediwiboze/CjfNmwm/astro_bot_corde_raide.pdf
    • https://limifotediko.weebly.com/uploads/1/3/5/3/135325738/varative-wekud.pdf
    • http://olipaka.xyz/72425903628l6jkk.pdf
    • http://goldenframecollision.com/phil_collins_in_the_air_tonight_mp3_free_download_320kbpsf6xfe.pdf
    • https://s3.amazonaws.com/sizadagazagaj/chrome_32_bit_for_kali_linux.pdf
    • https://s3.amazonaws.com/mamibis/active_admin_form.pdf
    • http://nedizilunok.myartsonline.com/nugipevavawufaz.pdf
    • https://s3.amazonaws.com/xidulumexi/nso_class_9_set_b_answer_key.pdf

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