Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4275283fdb830b0…

MALICIOUS

PDF

74.7 KB Created: 2021-03-10 00:50:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cf2423037155109870564557bdaeaa8f SHA-1: a6b7002c0569f70c264607597d43b5ff49624961 SHA-256: b4275283fdb830b0ee4c415c0bd89a47fac0307cd1b31dc80d68a6ac475ee494
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominent URL pointing to fokemale.ru, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is part of a link farm on disposable hosting, further supporting malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score indicate a malicious document likely designed to redirect users to harmful content.

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/wb?keyword=toyota%20camry%20l%20vs%20le%20vs%20se%20vs%20xle PDF link annotation
    • http://bufanono.iblogger.org/shatta_wale_ft_beyonce_already_video.pdfIn PDF document text
    • https://cdn.sqhk.co/ripudilibizo/hegfV0O/dadexibotazumukofudata.pdfIn PDF document text
    • http://mujetogavafe.22web.org/cheat_sheet_app_macbook.pdfIn PDF document text
    • http://xulilutunezenu.22web.org/brother_p_touch_1280_user_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/jokalirubore/zFWT3jb/2262449363.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_4ef1ae197b2d4dabb4cec59d1a6746ca.pdf?index=trueIn PDF document text
    • http://vepetisex.epizy.com/82004591752.pdfIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_e85348753a6444e3b04669187826121d.pdf?index=trueIn PDF document text
    • http://gugosezufuted.epizy.com/big_fish_games_list.pdfIn PDF document text
    • http://lexojowal.epizy.com/answer_to_the_impossible_quiz_number_34.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a5273d-4083-4380-9750-8633e60ee3f0/why_wont_my_cricut_press_turn_on.pdfIn PDF document text
    • http://zuwemanikipe.rf.gd/ada_diabetes_guidelines_2018_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eadb7c68-cb61-4b29-929c-285e1a62e7ad/breadman_bread_machine_manual.pdfIn PDF document text
    • https://746420f6-3007-491b-ba72-fd43be5094e5.filesusr.com/ugd/277b62_77741f36006b4719b5cac1de5c227f6d.pdf?index=trueIn PDF document text
    • http://toxalotivip.epizy.com/xudenozolavomobajazavenuf.pdfIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_3cfc1f3421c544b8b30062fe0954de05.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d166235-beac-4e4f-a2b2-9e4fc3bf046f/asp_net_mvc_5_survey_application.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_off0000e862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE862 5124 bytes
SHA-256: c501010ea46f2ed33c80fb1fb053531fb999a8f98e5f32043ef11660e74d108f
font_01_sfnt_off0000f9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C7 10512 bytes
SHA-256: dba9833c2c3758ebea417ee06211a7f215d8bf6013ae9386470cda6f0e4c7079

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