Malicious PDF — malware analysis report

Static analysis result for SHA-256 090722d54d3600c4…

MALICIOUS

PDF

66.5 KB Created: 2020-12-23 15:19:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d093591dcffe73496665d3db1a1c0d2d SHA-1: b5a81d30f33e4ed216bc314c957a62160f6d9ae3 SHA-256: 090722d54d3600c431efd49d74d8f63164766e9352da09d5beccb0a94a548c6a
156 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating it is part of a link farm, with one primary external URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to currency transfer fees, aligning with the suspicious URL's parameters.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/strik?utm_term=transferwise+fees+usd+to+inr
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f98294c678f1.pdf
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5fb94b1e70c0d.pdf
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/4101963.pdf
    • https://cdn-cms.f-static.net/uploads/4376103/normal_5fa430f80a4af.pdf
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f97d8c90aa5f.pdf
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5fa4c400c492d.pdf
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/tekon-fisigugarasu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1e6e8bd9-c4da-4b4f-83a0-edd301691934/asanas_608_yoga_poses.pdf
    • https://uploads.strikinglycdn.com/files/4969a30b-95fc-491e-b889-3994dac76131/long_sword_guide_mhw.pdf
    • https://uploads.strikinglycdn.com/files/9885fda7-8b4d-48e1-bbd6-f569b022b3cb/64846361074.pdf
    • https://uploads.strikinglycdn.com/files/92e21df1-05af-409d-9940-01da1274a7b4/38482603757.pdf
    • https://uploads.strikinglycdn.com/files/2c3175b8-d432-4b28-b57f-95d504c93da4/8860151480.pdf
    • https://uploads.strikinglycdn.com/files/7152dcca-1533-4005-836f-13f6a36bd833/47508896580.pdf
    • https://uploads.strikinglycdn.com/files/410384ec-0877-40a3-bbe9-10ec292fe91e/faxizofunini.pdf
    • https://uploads.strikinglycdn.com/files/3bbfe42d-491d-4e4a-90af-7f9a05c66258/buyer_s_market_album.pdf
    • https://uploads.strikinglycdn.com/files/ca34799c-5eb1-469a-bc45-86a348e976dc/39283157343.pdf
    • https://uploads.strikinglycdn.com/files/c11f44bd-0c5a-4750-8843-f0ca021a010f/etrian_odyssey_nexus_vampire_guild_card.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c580.bin
0c2980169ed72676862bd772dea5c3f41f62427bf2593cec69722f5f4a70b63a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC580 4912 bytes
font_01_sfnt_off0000d651.bin
6f7ca02db7cdeac436f55bfce182d939a4cb86f72c2c2d26eb872c2a4982ceb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD651 11356 bytes

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