Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd02d86316392866…

MALICIOUS

PDF

50.6 KB Created: 2020-12-18 11:38:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 81452dc8a8e8db9c2710632462fde27e SHA-1: a4955f4fd70714f141ac0c25363753c6ea3d3b23 SHA-256: dd02d86316392866ba041851a20adda26418d60424cf0b9bc2073e7abe0d6579
194 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including a link farm and a redirector, suggesting a phishing or malware distribution attempt. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK indicate a deliberate effort to create a deceptive link structure. ClamAV detection as Pdf.Phishing.Trojan further supports the malicious nature of the file. While no scripts were explicitly extracted, the PDF structure and linked URLs point towards an exploitation attempt, likely initiated via spearphishing.

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
  • 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.
  • 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://trafftec.ru/aws?utm_term=language+leader+intermediate+workbook+answer+key PDF link annotation
    • https://golosoruxo.weebly.com/uploads/1/3/4/3/134339442/bubulemavidugodozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458145/normal_5fd8321826e8c.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/87c13895.pdfIn PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/vafimutebijojot.pdfIn PDF document text
    • https://manukigobedor.weebly.com/uploads/1/3/4/4/134481395/sagiluzarunuxogoxew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428078/normal_5fc6bd712777b.pdfIn PDF document text
    • https://mofazutozu.weebly.com/uploads/1/3/4/8/134871383/vuwisaredawiva-xeluwivib-torojobov-fudovivin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452389/normal_5fc799cea4c59.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ce86403f5353fdaeacb4/t/5fc52190145a8629dc553f29/1606754704608/modelo_entidad_relacion_base_de_datos_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/2000_mitsubishi_montero_sport_repair_manual_free.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/malekijexizituliparesesa.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/adverbs_of_frequency_worksheets_for_beginners.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51c9aa87939686423652d/t/5fc810deed5bab3bcc90a8d0/1606947039043/amazon_driver_jobs_ohio.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/78216099998.pdfIn PDF document text