Malicious PDF — malware analysis report

Static analysis result for SHA-256 aac649c2c63a2151…

MALICIOUS

PDF

72.4 KB Created: 2021-02-18 21:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0f3f9fa4be6ef0230b647d8d7fec2635 SHA-1: 68afe9d52f408ad7a2240ea64a5de3e62d768a1c SHA-256: aac649c2c63a2151f9cae1cd82d0a725161dfeaeeb3e88a5b5a5aa070353aa37
184 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=best+stephen+king+books+made+into+movies In PDF document text
    • http://wezotarekexu.22web.org/nadazupipu.pdfIn PDF document text
    • https://pezomivagijo.weebly.com/uploads/1/3/5/3/135392772/dinupewirazedar-zijijujadewo.pdfIn PDF document text
    • http://latozon.iblogger.org/jisizusira.pdfIn PDF document text
    • http://mirror-x.org/drink_facts_did_you_knowralcl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424009/normal_601f2a9f220ef.pdfIn PDF document text
    • http://edapog.online/matlab_legend_komutusk5db.pdfIn PDF document text
    • https://jawoxufogor.weebly.com/uploads/1/3/6/0/136022219/6135915.pdfIn PDF document text
    • https://fitinunajixir.weebly.com/uploads/1/3/1/6/131637477/julixugokub-lafuwepaginitil-vexogetumalo.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/ijjlOhi/transferwise_account_type.pdfIn PDF document text
    • http://podarokinsta365.site/xerusuraxajozenatazezpnlz.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/gowamafojiwazuni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388156/normal_601a0161eac47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giwurebo.rf.gd/driver_sound_card_focusrite_solo.pdfIn PDF document text
    • http://tikikenuf.epizy.com/parovura.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_off0000ded0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED0 5560 bytes
SHA-256: 42a152a90f019913c8745fb09ffcf1783c95f3d7c84f52530997c6d68203657f
font_01_sfnt_off0000f198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF198 10396 bytes
SHA-256: 5a5ca7b0f2ec3176de537248c8c450f153097918be3fc3730fd3e1144d8a4a2b