Malicious PDF — malware analysis report

Static analysis result for SHA-256 f408ae227e40e4b4…

MALICIOUS

PDF

59.1 KB Created: 2021-03-21 02:29:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11a0b87ca5721a1f754c751f03dbf27a SHA-1: 7213952746cca171d8766650c1305727524f02ee SHA-256: f408ae227e40e4b4550b73ee53b874a2d861de9851147a13c4d3490316992097
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-only nature and embedded clickable link. The ClamAV detection and ML classifier further support its malicious classification. The document contains numerous external links, with one pointing to 'druttle.ru', which is suspicious and likely part of a phishing or malware distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6927

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 59 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://druttle.ru/aws?utm_term=presonus+audiobox+1818vsl+compatibility
    • http://goxuvux.22web.org/gdb_gef_cheat_sheet.pdf
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_142a12e886ff48209e6230a5e2b27327.pdf?index=true
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_4b8b7cb70add4a9d8ddf87ca695884c8.pdf?index=true
    • https://s3.amazonaws.com/damerirazib/boney_m_christmas_songs_lyrics_free.pdf
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_b01a35a450bf45bb853177c70a5bee27.pdf?index=true
    • https://s3.amazonaws.com/bogeguva/78448804973.pdf
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_3845d1b9577047528d74d8a61a98f911.pdf?index=true
    • https://s3.amazonaws.com/labitajaxatufib/common_irregular_imperfect_verbs_spanish.pdf
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_1b5c817e64464be19ea8f0f3e93fb81e.pdf?index=true
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_52df8ddf0a7d4067971b0502fddf0d2c.pdf?index=true
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_5883b2e9527a4e9abd1f29b16879d30c.pdf?index=true
    • https://eaa62ee9-779c-4a2d-9f50-6c66b019a99c.filesusr.com/ugd/1cc777_fcc9bc78b9934db49f8d89ccd1348228.pdf?index=true
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_286412e5f0ec4e79ab934c8df32d9217.pdf?index=true
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_77aa2d6c378c4a88ad0880b1267a60b6.pdf?index=true
    • https://203e60c5-e32a-4587-ab6d-31d66de6d5b9.filesusr.com/ugd/014c36_58c76d33d12349c5b6dc1cf42de6f840.pdf?index=true
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_b0cac0718b204c8ab561df20d844bdd9.pdf?index=true
    • http://fevedudebe.epizy.com/best_interior_design_html_website_templates.pdf
    • https://s3.amazonaws.com/bupesejirijejus/11665238455.pdf
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_a6549b48dc4742aeab2d0808bf30d7b0.pdf?index=true

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