Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed3cc4bfd7dec29…

MALICIOUS

PDF

75.3 KB Created: 2021-03-18 10:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5eb3cedb2591975be1f20c6bdac8bec9 SHA-1: ddd2179d22ff3901c5c2f3e8cb5a1dba94ff2ebc SHA-256: aed3cc4bfd7dec29ef155e62de5764c21c8a0e6f738445e9592bb3810127a2f0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/wix?keyword=greenlee+881+bender+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419637/normal_6019642996d0a.pdfIn PDF document text
    • https://cdn.sqhk.co/mupalewefe/aI8zicg/manual_de_supervivencia_en_zombieland_dying_light.pdfIn PDF document text
    • https://cdn.sqhk.co/mimufedu/yKohd1U/joker_mp3_ringtone_download_pagalworld.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417675/normal_5fcb0b14c4144.pdfIn PDF document text
    • https://cdn.sqhk.co/surixirulol/ARifjh9/95350232898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443804/normal_601ec6accb63b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374207/normal_5ff693f61040b.pdfIn PDF document text
    • https://cdn.sqhk.co/fukofuwuvis/chehdgg/21879566540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_602fd72bdeb6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502336/normal_604a17277041f.pdfIn PDF document text
    • https://cdn.sqhk.co/kojogitu/qZGwfja/braains._io_2_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379241/normal_5ff3f6bfde0fb.pdfIn PDF document text
    • http://nefotibabi.iblogger.org/autocad_2014_dynamic_blocks.pdfIn PDF document text
    • http://jedunoba.iblogger.org/why_does_my_salt_generator_say_no_flow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wolaniloko.epizy.com/ahmedabad_city_map_free.pdfIn PDF document text
    • http://sotilikesad.epizy.com/binomios_al_cubo_ejercicios.pdfIn PDF document text
    • https://53002a68-e35f-4167-ac88-1ab9777d7e72.filesusr.com/ugd/f5bc2a_04e8d39016224e9193d6e2dca252cdde.pdf?index=trueIn PDF document text
    • http://vuvulew.rf.gd/adobe_reader_apk.pdfIn PDF document text
    • http://viwivebobip.epizy.com/sewotufuf.pdfIn PDF document text
    • http://sekopute.epizy.com/physical_science_grade_11_textbook_download.pdfIn PDF document text
    • http://wokoguzesel.rf.gd/adolfo_bioy_casares_biografia.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_c45594e6f4b644c684e80a52c1c3fcc3.pdf?index=trueIn PDF document text
    • http://jaxojuruwak.rf.gd/powerpoint_design_templates_sports_free.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_off0000e898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE898 5212 bytes
SHA-256: 32f8fb9e9d8c95312572385f60135fa6b2eb1255625a9b9a5a8c979e787b3177
font_01_sfnt_off0000fa3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3D 11224 bytes
SHA-256: e47bf416768e446a8f7e2b215da3f54f1480c82bcadde7509ef9521b7048b77e

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