Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d9f1d6affb9205…

MALICIOUS

PDF

38.7 KB Created: 2021-09-26 16:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1fcce4551d70050a0264060112892876 SHA-1: e7ae0dddd5483a362e412afd610bdd93aa2571a8 SHA-256: e1d9f1d6affb920514b418494a42306f0618b225f96e050a4ae7e5f9b49181a4
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, indicating a phishing or malware distribution attempt. The PDF employs an image-only lure, typical of phishing campaigns, directing users to external URLs hosted on compromised or disposable domains. These links likely serve as a gateway to further malicious content or direct downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8588

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 38 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://smidgel.ru/uplcv?utm_term=how+to+install+android+on+linux PDF link annotation
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f8c9e0754---64645761955.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/rogogofutujew.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/85310035933.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/wawedugonovoxopukeko.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/d4a20c49eb09fe7a29a53c0e12e3b63b/46685760913.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/bavafakomotilelizikoso.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/lefujesilezarufabirebaruz.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/20046007369.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a4457306c84a51d5dea15704d94de15e/55587422291.pdfIn PDF document text
    • https://shirbandifelt.com/userfiles/file/153511991.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/38390171452.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210920132255.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/guduka.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614df1fd889c2---71975042844.pdfIn PDF document text

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