Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d1a6dd45288153…

MALICIOUS

PDF

43.1 KB Created: 2021-09-24 02:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 234635eeb9a2f647a580a1527a534b69 SHA-1: 899206354cfb4abae517f14bc1d934c1157b22c4 SHA-256: a0d1a6dd45288153a5acf131825518f6bdaba7021d9f14ab6c10bd115d2a4373
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical of phishing campaigns, containing numerous links to potentially compromised websites. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://sunrisemotelbellevue.com/nbloom/fckuploads/file/xigogesosu.pdf In PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/ruxivagusokojaw.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/julajejinusawavu.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef26b11609---komebetedomaxurilodegu.pdfIn PDF document text
    • https://el-tall.pl/pics/file/namuduluberukesede.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/84516488802.pdfIn PDF document text
    • http://nawoo.net/userData/board/file/34404989261.pdfIn PDF document text
    • http://eco-building.cz/UserFiles/File/40829193741.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210912_49026B94F13181B0.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/mukobiredo.pdfIn PDF document text
    • https://atputasbaze.lv/images/userfiles/files/dotokot.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/18000914482.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/jifobuzemibipumuvedikil.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/6594107977.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/92600260752.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/gitaxanilinuje.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/d2lak8s7gdplmul8vgatp3udn6/rofenofujokit.pdfIn PDF document text
    • http://banquat.com/userfiles/files/buxolukevexibe.pdfIn PDF document text
    • http://tieulongcopro.com/luutru/files/zeninemile.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdd92d2019---14214582.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210913_A4CF876301B2F887.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/lakebadanuselesixifota.pdfIn PDF document text
    • http://www.musicboxpiano.com/contentfiles/37585365100.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/16482619781.pdfIn PDF document text
    • http://www.omt.ntou.edu.tw/ckfinder/userfiles/files/milujiwub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=my+boo+apk+modPDF link annotation

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