Malicious PDF — malware analysis report

Static analysis result for SHA-256 29582a5082860510…

MALICIOUS

PDF

71.0 KB Created: 2020-12-16 16:07:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a95650722b56ec521f11286a41d869a7 SHA-1: 726c24cad2908525d4d5777459ff87b1c79693ff SHA-256: 29582a50828605108735f2fd1168969e58bfbde40cf5eedd64575b2e2701da28
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous external links, many hosted on disposable domains, indicating it functions as a link farm. The primary URL, 'https://traffine.ru/aws?utm_term=como+baixar+jogos+para+emulador+ppsspp+android', suggests a lure related to downloading emulator games, potentially leading to phishing or malware. No scripts were extracted, but the PDF structure and link farm behavior are indicative of a malicious intent to redirect users to harmful content.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/aws?utm_term=como+baixar+jogos+para+emulador+ppsspp+android
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f8d23b991ebe.pdf
    • https://buvitefano.weebly.com/uploads/1/3/4/1/134131500/eaf64.pdf
    • https://cdn-cms.f-static.net/uploads/4388046/normal_5fae0ad34cfd5.pdf
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9031774.pdf
    • https://gifivetusox.weebly.com/uploads/1/3/4/7/134736849/dodaxigekizilij.pdf
    • https://sunakolezapomuj.weebly.com/uploads/1/3/4/6/134698053/4263676.pdf
    • https://cdn-cms.f-static.net/uploads/4392871/normal_5f94ced6ec110.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/5325fdb7-b6cf-4983-9dd7-fbdac80b38f8/92853847020.pdf
    • https://s3.amazonaws.com/gidibesuxi/lagu_beady_eye_blue_moon.pdf
    • https://uploads.strikinglycdn.com/files/e896b17e-effc-4f16-a240-d09f0bd094dd/49184168573.pdf
    • https://static1.squarespace.com/static/5fc5a3e840f1034a5cc929d3/t/5fd003d310495c0ba9169aa6/1607467989114/digimon_virtual_pet_2020.pdf
    • https://s3.amazonaws.com/dixaleko/witch_hunter_s_armor_witcher_3.pdf
    • https://static1.squarespace.com/static/5fc0f5bf0a2757459be32ffe/t/5fcd6168cded405bb8eaf61d/1607295337109/94075056830.pdf
    • https://uploads.strikinglycdn.com/files/c1f9d68a-0eda-41ae-acf6-dc74b7e7a021/97830313268.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6fd.bin
cae21f2b4b07606cb374972492c5074bbf7cfd595af26429a5900b75fe069dd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FD 5388 bytes
font_01_sfnt_off0000d931.bin
4d068d65eff5f74fa68bfca764b22a1d42a9b4313435b8e5d419e556f0ce39b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD931 12304 bytes
font_02_sfnt_off0000ff46.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF46 4324 bytes

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