Malicious PDF — malware analysis report

Static analysis result for SHA-256 5991aa94e36d0da0…

MALICIOUS

PDF

80.9 KB Created: 2021-03-30 15:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8844b901e13f5814470c4255cb704993 SHA-1: e4ed9717e400a42f597eae05a7767686a8d98ac2 SHA-256: 5991aa94e36d0da0871da77fa5354938a9f97a7243b0aeaeca2ea95ea9641d30
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'fokemale.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm hosted on disposable domains, further supporting malicious intent. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/strik?utm_term=how+do+you+fix+the+auger+on+a+pellet+stove PDF link annotation
    • http://ccckkkkk.space/chick-fil-a_1001_blythe_blvd_charlotte_ncglsbi.pdfIn PDF document text
    • http://hisgohar.site/como_trabalhar_consulado6ajo5.pdfIn PDF document text
    • https://cdn.sqhk.co/tazakabebilo/5hhiePk/10880573949.pdfIn PDF document text
    • https://cdn.sqhk.co/zagakobafot/JlTShh5/monument_valley_utah_directions.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/dW4vkLa/township_of_union_public_schools.pdfIn PDF document text
    • http://pirikulifiwitif.iblogger.org/alex_rider_television_programme_season_2.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/GOgjwE7/tom_and_jerry_cartoons_complete_collection.pdfIn PDF document text
    • https://cdn.sqhk.co/xesofosirija/idhegdT/courier_services_near_me_contact_number.pdfIn PDF document text
    • http://momentikshop.space/how_to_turn_on_farberware_coffee_makerlzxbw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_b71f1c95441b4aef8140ddddfa5c02da.pdf?index=trueIn PDF document text
    • https://438c9214-13ba-44a2-8469-a4c97ff43377.filesusr.com/ugd/5d46a0_af64df268a4947ff9d39818809d5d6b4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba38a8e7-f80d-4072-8e2d-2a65be66ba94/warhammer_40k_new_necron_codex.pdfIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_3fed0ad700d04e19b5569e8c3c6e3862.pdf?index=trueIn PDF document text
    • https://f171294f-ed7a-4884-a773-1e826a512430.filesusr.com/ugd/20d861_1f52e94985eb431385bc19426f3beb5b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab071fa-574c-41fc-be39-44f9f6785cf0/paxowur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4510ea0-cc0f-48f8-b5e4-3f8f6d46e5f9/jadusapatopebagilugategoj.pdfIn PDF document text
    • http://xelepidozagetof.epizy.com/autodesk_3ds_max_2020_tutorials.pdfIn PDF document text
    • https://520c840f-7702-4e28-87de-278da5b03b63.filesusr.com/ugd/e633b3_108247d2feb6409ab8ff0abce34c96e8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b056d84-ad47-4ea0-8a53-e2aa0a284261/48035416151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/311a42a3-14dc-49e8-9110-b90f74ada5c9/how_to_knit_entrelac_instructions.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_off0000fe0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0A 5584 bytes
SHA-256: c9d6656eb7ec1f7b7720a0e7d06fc529327a3a1acb63b23f5b71360c05f69254
font_01_sfnt_off00011126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11126 10948 bytes
SHA-256: e3b843b0faf994b8293ca6e17fd5e440b1e1dd23642eb35acbccc7642c4caa93

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