Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8ce2989c343843…

MALICIOUS

PDF

50.6 KB Created: 2020-11-10 18:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 33dbfa7decc64980d6a8e293e00d6b0e SHA-1: 3131e12d06129c923bd40571d19f40448d7a9958 SHA-256: 5e8ce2989c343843fbcc3922ac7b819dd3104cc7a86dc5ff93764d614ed3e652
252 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links designed to redirect users to malicious websites, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The primary redirector URL is 'https://cctraff.ru/aws?keyword=going+postal+pdf', which is used in conjunction with other links to create a link farm. The ML classifier also flagged this PDF as malicious, supporting the phishing and redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6781

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/aws?keyword=going+postal+pdf In PDF document text
    • https://gunoserikufetof.weebly.com/uploads/1/3/4/3/134360264/sawutodidu-nojila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f889c1d8d89e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387573/normal_5f9195f3a2e64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457311/normal_5fa685d7209d7.pdfIn PDF document text
    • https://bubiwodepu.weebly.com/uploads/1/3/2/8/132815961/2403684.pdfIn PDF document text
    • https://malinozibide.weebly.com/uploads/1/3/4/3/134380659/pokipexutex-lazabedajap-nuvepen.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/dobegesipuretozuwifo.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/lulax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a284f8-943b-4875-a109-9b008f68f566/70605805965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/623ded25-c2d7-477a-a3ac-5c7b0d2fb2b8/24_7_free_spades_card_game.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/atrocity_act_marathi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de65641-14bb-43c3-a19b-0311d1606106/40937383252.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/fakupelobiza.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/skam_season_1_episode_1.pdfIn PDF document text