Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e7c7f73704b706…

MALICIOUS

PDF

67.1 KB Created: 2021-06-07 10:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7336f776f7809d1c94eb3fef713744ca SHA-1: 5c8d3c03661f80db4df46d61798fc5ee7350bff9 SHA-256: 67e7c7f73704b7060177356dfd55bc2a7b05a62ab0d7561c9c8f3f42b4c66682
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'catamma.ru' which is likely part of a phishing lure. The PDF also functions as a link farm, with numerous external URLs, suggesting an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://catamma.ru/pbw?utm_term=donald+duck+comics+subscription
    • https://savatevadenu.weebly.com/uploads/1/3/1/4/131452836/jalemaverivaxat.pdf
    • https://cdn-cms.f-static.net/uploads/4410702/normal_5fd7a6864fcd0.pdf
    • https://cdn-cms.f-static.net/uploads/4484812/normal_601b37f725f06.pdf
    • https://xokotenesuku.weebly.com/uploads/1/3/1/4/131438709/6564912.pdf
    • https://jiwazakamofefuf.weebly.com/uploads/1/3/4/0/134041011/tejiwuz.pdf
    • https://rilodogalaru.weebly.com/uploads/1/3/4/3/134398508/wivobola.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jobojifitin.pbworks.com/f/passive_voice_simple_present_exercises_multiple_choice.pdf
    • http://kikipudojuzo.pbworks.com/f/download_canva_pro_mod_apk_for_pc.pdf
    • http://wojipag.pbworks.com/w/file/fetch/144413409/rewadepu.pdf
    • http://degagogo.pbworks.com/f/dual_whatsapp_apk_free_download.pdf
    • http://pulixojesu.pbworks.com/w/file/fetch/144565032/what_is_the_coldest_place_in_the_united_states_now.pdf
    • https://uploads.strikinglycdn.com/files/7cbb42a0-ea65-45b7-9796-eaf9d021f25f/xulawavilo.pdf
    • http://numefen.pbworks.com/f/erik_erikson_theory_download.pdf
    • http://xumamiz.pbworks.com/f/13002140236.pdf
    • http://mepijewaj.pbworks.com/w/file/fetch/144426291/49611279687.pdf
    • http://wamotarirup.pbworks.com/w/file/fetch/144626703/los_adverbios_en_espaol.pdf
    • http://zulamiz.pbworks.com/f/transitive_and_intransitive_verbs_exercises_with_answers_for_grade_7.pdf
    • http://namimutigete.pbworks.com/w/file/fetch/144748713/how_to_determine_bicycle_inner_tube_size.pdf
    • https://uploads.strikinglycdn.com/files/fb2e351a-a387-482d-b21c-d5fe12c41984/talujibuxigubevizitora.pdf
    • http://barumena.pbworks.com/w/file/fetch/144778416/50810585174.pdf
    • http://mitamugukojo.pbworks.com/w/file/fetch/144673182/17345605883.pdf
    • https://uploads.strikinglycdn.com/files/7a01b712-eb19-47b6-9666-1630d3a31a32/bank_of_america_compliance_officer_salary.pdf
    • https://uploads.strikinglycdn.com/files/2329b4ab-fb0d-4dbc-91ea-21fc2a9ad0fc/64975070885.pdf
    • http://jukozatixul.pbworks.com/w/file/fetch/144712281/abcd_2_full_movie_download_pagalworld.com.pdf
    • https://uploads.strikinglycdn.com/files/6a4b5eb5-b760-4a74-a9ad-d9176dc55b71/how_to_be_a_spanish_medical_interpreter.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_off0000c814.bin
24c69393975d3f916fc20cd78c2d6261dbfefd94db8fb8d852a33ef3b5ce94df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC814 5424 bytes
font_01_sfnt_off0000da6c.bin
72e9dae85535d51803c5c9c89a59329bcaefd442446c042eff1e5d70456a458b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6C 10956 bytes

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