Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf729205673fb4c…

MALICIOUS

PDF

78.6 KB Created: 2021-03-19 09:13:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c72e19465b898b8382510869d67e317 SHA-1: 6c9aad9217621eea5c22cefb50b6a1c79307db5f SHA-256: faf729205673fb4cc4f8cc386e4787efeefeb4d9c8c163ffdc60392766af4f7c
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains references to 'washing machine 0e error' and 'wkhtmltopdf', suggesting a lure related to technical issues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/aws?utm_term=washing+machine+0e+error
    • http://lnstagramcentre.net/sanimuxokewazopendi07e.pdf
    • http://mosebuzixat.mywebcommunity.org/analisis_del_libro_apocalipsis_de_la_biblia.pdf
    • https://cdn-cms.f-static.net/uploads/4446937/normal_6024b7c52f980.pdf
    • http://zonokiwuwagupu.getenjoyment.net/how_to_become_a_certified_compliance_officer.pdf
    • http://wigageturuv.mywebcommunity.org/2002_ford_explorer_tire_size_chart.pdf
    • https://static.s123-cdn-static.com/uploads/4393772/normal_5fc68c09e8eef.pdf
    • http://davupopebuwiser.sportsontheweb.net/57072850453.pdf
    • https://static.s123-cdn-static.com/uploads/4366628/normal_5fcdff9c94e0d.pdf
    • http://wordsidepost.top/apod._nasa._gov_apod_archive_pixfull._htmlt2nwt.pdf
    • http://rasprodavaika.ru/63154781549pnkvl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/59dacbfe-aa89-49ed-b76b-3a9e78114df4/dell_latitude_e6410_datasheet.pdf
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_f74d40bb663a41298901e2fa8dec9f4c.pdf?index=true
    • https://s3.amazonaws.com/zesotat/94583659848.pdf
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_2cd61f00f03e4d82b21ac6b21891e8c2.pdf?index=true
    • https://s3.amazonaws.com/rokuwapesu/space_flight_simulator_full_game_apk.pdf
    • https://uploads.strikinglycdn.com/files/624437d4-df3a-4350-a713-fbd59778b468/logarithm_table_2010.pdf
    • https://s3.amazonaws.com/jifesu/vogefitabipo.pdf
    • https://s3.amazonaws.com/vebogotexaf/vibrate_when_call_is_answered_samsung_a20.pdf
    • https://uploads.strikinglycdn.com/files/24ea8bd9-61c9-4141-972b-949503633d15/the_hunger_games_catching_fire_free_online_movie.pdf
    • http://xejobutek.onlinewebshop.net/guwosalemukulatotivijaf.pdf
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_5ade9f6fd0594184afcf9b9b6d88d848.pdf?index=true
    • https://uploads.strikinglycdn.com/files/26ec5be7-fa59-46fe-b9a7-100083f841f6/73642031075.pdf
    • https://s3.amazonaws.com/timeziso/26917574003.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_off0000f632.bin
6f04acff3ec3dc514cb69c4ec77d9740678b804ab7267a61528942cf1ee454f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 5336 bytes
font_01_sfnt_off0001083e.bin
b7ea7b99d5ce23334261050ca27c5042441493fa9a68fb9041bc43eb643ea855		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1083E 10796 bytes

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