Malicious PDF — malware analysis report

Static analysis result for SHA-256 c979a8558b3b8dd2…

MALICIOUS

PDF

77.8 KB Created: 2020-12-27 05:25:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4137d9ff936b121f99ea7f8cf57e3d50 SHA-1: b5c7a645bfb2632a06e4a0f3b7a2c3e59bd680eb SHA-256: c979a8558b3b8dd2d8cbb3bf39cfb6d2de2a0d0dbbd85ee87e761fc5b45434cd
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 flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution attempt. It contains numerous external links, forming a link farm, and one of these links, 'https://trafffe.ru/strik?utm_term=pixelmon+mod+mcpe+free+download', suggests a lure related to game mod downloads. The PDF's structure and embedded links are designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/strik?utm_term=pixelmon+mod+mcpe+free+download PDF link annotation
    • https://sazigusejif.weebly.com/uploads/1/3/4/7/134771803/soxetodateze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378406/normal_5fc527d03718a.pdfIn PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/6142839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483870/normal_5fd18aa8222d4.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/jakgcjf/72477982460.pdfIn PDF document text
    • https://gafalevomunu.weebly.com/uploads/1/3/4/2/134235362/losopefigarofe_xakizapij_gejutetu.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/zhhEFjd/stacked_crates_scrap_mechanic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459174/normal_5fd8c20cab430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5fa30a48d46bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465691/normal_5fd7e35fb5517.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365563/normal_5fce94db3cb31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371023/normal_5fb55a34aa1a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470979/normal_5fa9310f813c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE45 4992 bytes
SHA-256: 57db46f25fa86828ca102e3765c38d66ad0f9d62647f37f08a28dd66756566dd
font_01_sfnt_off0000df23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF23 10912 bytes
SHA-256: 7c72ef6d8d3d34cc4e9f758612d1c3d8b533d36d3af98de5684a681dbc0cc6aa
font_02_sfnt_off00010453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10453 16424 bytes
SHA-256: 8523669836d4109092468cbee42f9c8a295cef6069f14c59afd69701de3fdd29
font_03_sfnt_off00011a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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