Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c35a67caa448d9b…

MALICIOUS

PDF

49.6 KB Created: 2021-01-13 18:30:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6fa9e6f73dea0922cc10f3b89f3ac613 SHA-1: 3d9842eaeb11c12ad58c343f21f7118c47b08078 SHA-256: 8c35a67caa448d9b28d1f032daad5e19a84cc5db89ca03b5ed3c7ea99dc5f98b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6064

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffine.ru/aws?utm_term=clear+cache+data+in+android+pie PDF link annotation
    • https://cdn.sqhk.co/fakosopalo/icOjbji/best_colouring_pages_for_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/jbjilFb/shudder_as_a_noun_in_a_sentence.pdfIn PDF document text
    • https://cdn.sqhk.co/fekesolip/jijdd74/plants_vs_zombies_mini_games_play_for_free.pdfIn PDF document text
    • https://jowamevo.weebly.com/uploads/1/3/4/5/134511132/fafavarirule.pdfIn PDF document text
    • https://site-1180454.mozfiles.com/files/1180454/top_10_country_music_songs_april_2019.pdfIn PDF document text
    • https://site-1182082.mozfiles.com/files/1182082/61266497741.pdfIn PDF document text
    • https://site-1176154.mozfiles.com/files/1176154/house_of_flying_daggers_parents_guide.pdfIn PDF document text
    • https://simisidexibasu.weebly.com/uploads/1/3/4/5/134502995/2109967.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/pCvTgid/amazon_n95_face_masks_made_in_usa.pdfIn PDF document text
    • https://mubajodopiwal.weebly.com/uploads/1/3/1/4/131454521/729dbea3de8006.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/33544718082.pdfIn PDF document text

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