Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5aa362669912bea…

MALICIOUS

PDF

93.4 KB Created: 2021-03-09 15:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 6e35c6d16151c261a1df7df283ce3ade SHA-1: 8a5fa4673a364a0bed0968e3f90741c0ddc08e93 SHA-256: c5aa362669912bea8aebd0a6c0dc286a4bb0354dc7639c5451fb479dc841ab3f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a likely attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic for distributing malware or conducting phishing campaigns.

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://mezovuduw.ru/wix?keyword=reading+answer+the+rise+of+agribots PDF link annotation
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/notonevumamoxazowev.pdfIn PDF document text
    • https://kufidadifijerid.weebly.com/uploads/1/3/1/4/131407945/bd04e18b76.pdfIn PDF document text
    • https://jezaxinadi.weebly.com/uploads/1/3/4/5/134597346/xonojijasowugadepi.pdfIn PDF document text
    • http://azules.ru/fusion_360_cam_tutorialjbn1y.pdfIn PDF document text
    • http://ziwefewixus.iblogger.org/10488310864.pdfIn PDF document text
    • http://rofadiv.iblogger.org/ginejuvupazut.pdfIn PDF document text
    • http://wemuwugisenoro.iblogger.org/requirements_to_be_a_small_engine_mechanic.pdfIn PDF document text
    • https://bagubabijotete.weebly.com/uploads/1/3/4/3/134319258/7348309.pdfIn PDF document text
    • http://matidiwuxamige.iblogger.org/sidunatofalerupe.pdfIn PDF document text
    • http://websecurer.tech/why_is_my_dish_volume_not_workingyy1xe.pdfIn PDF document text
    • http://getallcreditscores.info/mikoruzezovisebazitwqpn7.pdfIn PDF document text
    • http://trokot-tonirovka.online/maths_worksheets_for_6th_gradey5v4v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://susesibukof.epizy.com/completing_the_square_igcse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdda463b-608f-43e1-b6b2-d55ed5731469/misery_stephen_king_character_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/275acaa8-c904-4d6b-9d41-9649ee49392d/old_bridge_high_school_address.pdfIn PDF document text
    • http://toguxekedufu.epizy.com/nipapaxowafifeselakowese.pdfIn PDF document text
    • http://buvodadixasiz.epizy.com/relafumozokuzazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ca1e778-ff53-41b2-86f5-74542b35ea58/76026351819.pdfIn PDF document text
    • http://toxiramagelovit.epizy.com/83664450050.pdfIn PDF document text
    • http://dinamol.epizy.com/golilimukogun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6004785d-9d4d-4aaf-b95e-cbb283626e1d/how_to_find_the_height_of_an_object_by_its_shadow.pdfIn PDF document text
    • http://winaror.rf.gd/the_return_of_the_king_1980_cast.pdfIn PDF document text
    • http://supikatiwo.rf.gd/ledumosididekedemegikik.pdfIn PDF document text
    • http://sulipirakiran.rf.gd/pasteurization_of_france.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c87988d-a4a6-49f6-bbc9-6a552bbf2feb/34295341015.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_off00013058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13058 5376 bytes
SHA-256: 6eb4ca8aa473ee9992e9a672929a6e33b495feac007245923099622898c2b08e
font_01_sfnt_off000142b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142B6 10928 bytes
SHA-256: 6ddb8c974199f60f61f2f315b2439c11424aac345506a69f2ca065943d35cfb0

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