Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea40a89809f3d442…

MALICIOUS

PDF

79.5 KB Created: 2021-03-21 09:13:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 015f20297ed67a52c5a4728ba4596018 SHA-1: cbb0597a213a1eebad55d13889939944d1b60d9a SHA-256: ea40a89809f3d442b7b224d64d11e085075ddf6cbe56f654f31aa28dc45c1ad8
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains numerous external links, with a primary focus on 'https://maypoin.ru/123?utm_term=formal+absence+letter+example', suggesting an attempt to redirect users to potentially harmful content. The document body, though partially corrupted, indicates a lure related to 'formal absence letter example'. No scripts were extracted from this sample.

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 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://maypoin.ru/123?utm_term=formal+absence+letter+example PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454562/normal_5ffbd4fc07ed2.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/TZPkyKB/atif_aslam_songs_list_all.pdfIn PDF document text
    • http://lezapogogaz.iblogger.org/96429553153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500669/normal_6051fa514721b.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/3gcpDjb/ice_scream_2_horror_game_download.pdfIn PDF document text
    • http://xuxelenoxuze.iblogger.org/65584195617.pdfIn PDF document text
    • https://cdn.sqhk.co/livejizilul/hgcAjh0/after_effects_templates_buy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_60304d75860ab.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/fign8ia/dr_neil_cheesman_dentist.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/pak_tv_world_live_channels_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/75912741346.pdfIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_6839ddf9b9ae4d1a8e40a793b714d981.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nonabafat/android_studio_requirements_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/veripurew.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/91859321969.pdfIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_21ce7e01399149dd9f875ff1e2c320d0.pdf?index=trueIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_f1784903562648e9bb8595607b4c1d91.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/aashiqui_2_audio_songs_pagalworld_mp4.pdfIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_2d3329d0c6fb4639963516bb76830b0a.pdf?index=trueIn PDF document text
    • http://venonerenosuzan.rf.gd/1_what_are_the_five_different_arguments_for_the_existence_of_god.pdfIn PDF document text
    • http://karajifaderiwow.epizy.com/68498777667.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/xuxajelax.pdfIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_5baa525efd144515a189774d30ebadf5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/le_syndrome_pyramidal.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_off0000f874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF874 5240 bytes
SHA-256: 4303922775208f4632c6cf4797b9396112924021c347edc747a12c264ac09fa3
font_01_sfnt_off00010a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A30 10808 bytes
SHA-256: 618112a72dd246cbcd82c2e444d7552533489dce585751a0d521e71931c9e6ce

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