Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9edf40d8812e7b9…

MALICIOUS

PDF

72.6 KB Created: 2020-11-25 23:46:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 73aaf73d72027a0720aab8d94cf0feb2 SHA-1: ef88e550be21072f3ba0831f27c491a806d47cf8 SHA-256: f9edf40d8812e7b92ad5163a15f9253ed3c9f3e1d2610a17cc39b8fb777c74dc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://traffset.ru/strik?utm_term=giant+snake+pathfinder+2e PDF link annotation
    • https://mudigaxufiwibu.weebly.com/uploads/1/3/4/6/134639529/matevodivifo-raniti-fokusizovekuxu-fidozeva.pdfIn PDF document text
    • https://fotumepajise.weebly.com/uploads/1/3/4/8/134857071/a2ede023647280.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/zuvekazabuz-topofelo-gupolekodojavo-ponabiloxe.pdfIn PDF document text
    • https://volexerakonoza.weebly.com/uploads/1/3/4/7/134713377/0fb0eff400dd0.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/206577b2-80e8-4e0e-b272-acf312e368d8/dadufenidopomev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd510998-c38a-4bda-9dbd-4e1236ab6f14/zero_limits.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/good_riverclan_names.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/kagavatevawiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/623bed52-ec81-40e1-8137-b912217c6950/7423298965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf11d357-7dff-4f60-b2fb-1ef7dcf2a1c5/shinchan_full_hd_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ebaabcf-7816-4e95-9025-c9a679a184c4/the_altar_george_herbert.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0cf82b9-99a5-4b90-bfa7-c3a4409e6345/26328904493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81b8a420-981a-4564-b533-d1c5313d8ad8/jijelamiralupobuxakawukin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b3fe168-6ec3-4cff-9452-06902d0350b7/51280819483.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03C 5324 bytes
SHA-256: 6a1c3b4609df830da14182641bfe6ab58e47c6db780bb54de975ce3632c21a90
font_01_sfnt_off0000f25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25C 10496 bytes
SHA-256: 1f6b999aa9589a89acf508b9c54d8661e7aa2b084aca54ad51e1c7d81509479e

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