Malicious PDF — malware analysis report

Static analysis result for SHA-256 674fc159680db6fd…

MALICIOUS

PDF

52.6 KB Created: 2021-06-01 02:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a943cce93a9861c44f46fbdab2c2c20a SHA-1: 86823759213ad217f9f3810df42714ba168ce593 SHA-256: 674fc159680db6fd5ffb2b6ddf255b6e0ac47b4f2be46ec5e8d486ee637a1655
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF is identified as a phishing lure due to its image-heavy nature and embedded clickable link. The heuristic 'PDF_IMAGE_LURE' indicates a common tactic where a screenshot masquerades as a document to trick users into clicking an external URL. The primary URL, 'https://baarspo.ru/wb?keyword=envision%20math%202.0%20grade%205%20workbook%20pdf', is suspicious and likely leads to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8840

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-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 52 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://baarspo.ru/wb?keyword=envision%20math%202.0%20grade%205%20workbook%20pdf
    • https://static.s123-cdn-static.com/uploads/4382643/normal_5fed12d2ea6c6.pdf
    • https://cdn-cms.f-static.net/uploads/4482618/normal_603eff428bdb5.pdf
    • https://cdn-cms.f-static.net/uploads/4471234/normal_60120a7c06e44.pdf
    • https://jidukuroji.weebly.com/uploads/1/3/4/0/134013204/dumululajixitu.pdf
    • https://mogeletonedilo.weebly.com/uploads/1/3/1/4/131482944/kelufariwona.pdf
    • https://pojalizug.weebly.com/uploads/1/3/4/5/134591246/rajiwugotugu.pdf
    • https://cdn-cms.f-static.net/uploads/4417222/normal_600be59f25cf1.pdf
    • https://cdn-cms.f-static.net/uploads/4393900/normal_600fc186152be.pdf
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/tolokopupizej.pdf
    • https://static.s123-cdn-static.com/uploads/4374372/normal_5fde8fc7978e5.pdf
    • https://tutiwelureno.weebly.com/uploads/1/3/4/7/134714557/vofagof-xejujaz.pdf
    • https://cdn-cms.f-static.net/uploads/4425772/normal_6061139b69a4f.pdf
    • https://static.s123-cdn-static.com/uploads/4394062/normal_5feee18191647.pdf
    • https://jazejuvo.weebly.com/uploads/1/3/4/4/134439384/3546500.pdf
    • https://cdn-cms.f-static.net/uploads/4424361/normal_6056f1f89717c.pdf
    • https://cdn-cms.f-static.net/uploads/4485166/normal_6049815c5e3ed.pdf
    • https://cdn-cms.f-static.net/uploads/4403533/normal_6013b4a53a47a.pdf
    • https://pagowabelada.weebly.com/uploads/1/3/0/8/130874520/6ce8e7ba87e71.pdf
    • https://uploads.strikinglycdn.com/files/419a34dd-58fb-4ca0-8ce9-954a29eafff0/what_are_some_examples_of_situational_irony_in_the_tell_tale_heart.pdf
    • https://uploads.strikinglycdn.com/files/e24c3fa5-2ea2-41cd-b39f-96c75ff8d1c1/convert_html_to_php_library.pdf
    • https://uploads.strikinglycdn.com/files/8469fdfa-2307-4470-89b4-96858ff6117f/where_does_the_story_thank_you_maam_take_place.pdf
    • https://uploads.strikinglycdn.com/files/b29c93a5-dcb1-4dd3-8737-a7f361118aa7/the_missing_movie_trailer.pdf
    • https://uploads.strikinglycdn.com/files/8839cbe9-5e07-4ad9-9fa4-54849ade2a5f/pazenorubuworegivividoxo.pdf