Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f703461394d89a…

MALICIOUS

PDF

81.4 KB Created: 2020-12-11 21:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0e7ab9da0ec45a923cc6a48be1a7bad0 SHA-1: 3b2032f736c4196b0d707fa9ddd742618800635d SHA-256: 06f703461394d89a384cc4dc1eecb908efdebef7018daa56f9b58da3b29c3485
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with one prominent URL pointing to `https://trafficel.ru/strik?utm_term=tom+and+jerry+images+hd+download`. This suggests the document is likely part of a link farm or phishing campaign designed to redirect users to potentially harmful websites. No scripts were extracted, but the presence of embedded URLs and the overall structure strongly suggest a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://trafficel.ru/strik?utm_term=tom+and+jerry+images+hd+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5fa1f737a7172.pdfIn PDF document text
    • https://vijejomikozo.weebly.com/uploads/1/3/4/6/134668467/4344895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f870a963b462.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/e37b37b2-b6dc-4a9a-b283-e46159b44ef0/77754182120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e470f9-7643-4dad-b90b-61c2dab9a874/64879197732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/875fad2f-3738-45f6-b319-ce8b353552ed/tedegur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a52e1d-87a5-4e87-935a-e18dc26fa9db/57304252139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5af605-5772-4b0b-9a3d-afc5ecf18a24/93436774114.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/diamond_gusset_jeans_free_shipping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f75e2b5-5834-4472-9008-0002073ce7ee/pazusoxesutogajopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86c4a06-9a40-4042-9cdb-9227fcab9f1d/frozen_cake_ideas_fondant.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94E 5456 bytes
SHA-256: f8a8e9b3682e9af2c11f5d07e1f7b87b17e0906ffa77c51102e9e3f84d14ae34
font_01_sfnt_off0000fbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCB 11476 bytes
SHA-256: 721cdb3c42c720ce9fd075e7b1f54db823f065348a7733da9d77230656c6ddc0
font_02_sfnt_off000121bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BF 16096 bytes
SHA-256: 3bb08857b08983a257d5a2052628e18542fd51c8d29f5bbef87ea8b8ace00841

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