Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d1d719308214c2…

MALICIOUS

PDF

52.3 KB Created: 2020-11-28 23:17:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ec86828ba278459524a84942902747c9 SHA-1: 73d5cf2e9618b25c6637612fcf924e804c718c95 SHA-256: f0d1d719308214c2cfa4f126d34f9a99555762d92140d6aeef19ebf8fe61b17e
252 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document acts as a link farm, directing users to various external websites, including a known malicious redirector. The primary lure appears to be "current affairs 2019 mcq with answers", suggesting a phishing or scam attempt. The embedded links are designed to lead users to potentially harmful content, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8894

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://gettraff.ru/aws?utm_term=current+affairs+2019+mcq+with+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386607/normal_5f98656475266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_5f9a88ae8a283.pdfIn PDF document text
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/40a5e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_5f89056c9efff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8b3cfb2b34b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453909/normal_5fadd1f0d3a1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415951/normal_5f9ceefb2068e.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/kopiwu_gotatumeturi_bovejixegas_vivikow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5f8df6aa8328d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489992/normal_5fbf2b2a397ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_5f88477e3b4a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3afa5ef-b6f8-41bf-ae69-da8a09b89782/fefuporokugegixizizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c576ab12-d5b3-4250-9625-8d0a4ebcb421/nioh_smithing_text_farming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4a371dd-6a5d-45e4-b6a8-d82967af0953/libro_de_thoth_espaol.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F2 5696 bytes
SHA-256: 0a0340f2b1dc6e0314d5e250c3b3dd6b38a3ec9bbc0e8febd2142d292aff311f

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