Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5933f87939b96ab…

MALICIOUS

PDF

80.8 KB Created: 2021-03-26 11:55:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 344e2c6fa49f76c4d1a02f84d17b7abd SHA-1: 124328b45537aedf5b4ee3d62a6e66776ba5d5c7 SHA-256: d5933f87939b96ab80026db2447b505097cae3db54c0624c56bebb164cbb5eaa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/123?utm_term=kinesiology+tape+guide+pdf PDF link annotation
    • https://cdn.sqhk.co/jofijoju/icCiiwX/verilukes.pdfIn PDF document text
    • http://kosodidaxelo.22web.org/dibiwekazoruvetim.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/ejihcv4/hello_neighbor_game_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/hbjb01P/2018_v4_mustang_0-_60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/wrong_turn_3_movie_mp4.pdfIn PDF document text
    • https://48b7024d-7414-4593-b44d-ed892b96ad15.filesusr.com/ugd/3e5db3_afb855e362224a1fa937785ce246db67.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8e90b4-2985-4957-a078-15f7a0e0e1d8/furuguxaxavos.pdfIn PDF document text
    • http://felawikemuda.epizy.com/cup_of_tea_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf729b5c-f051-47d1-af12-ac946a88fad7/rinnai_rur98i_service_manual.pdfIn PDF document text
    • http://keraxeberukin.epizy.com/parts_of_speech_worksheets_high_school_with_answers.pdfIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_036ca75046434aa1a2f5e9bc30a23ca7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a1d88cc-7e60-422c-8e9d-9aa9f862fa2c/car_repair_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4927cc55-4695-4de0-9746-cc0dbc51f4c5/how_to_connect_iworld_speaker_to_iphone.pdfIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_bd2bb98659b542db8641de683f1687bb.pdf?index=trueIn PDF document text
    • https://8546b567-499d-44cb-812b-f4cb210fa0cc.filesusr.com/ugd/1f0b74_b0ebf02d24dc4b598009a67f36aba988.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ebe6f00-55c8-4526-85b5-b244918ac292/zudewukolabavug.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/xaxapovexafibadenur.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_b2eec3a184f6401687bb5a945bbc0f89.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/happy_birthday_to_me_pictures.pdfIn PDF document text
    • http://wixudilasajigil.rf.gd/rurujerewekanabusew.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_off0000fd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD14 5184 bytes
SHA-256: 3171db7c17c11f65331240db3c746f72803ab8843bd799e05e95fcc56b3535a5
font_01_sfnt_off00010ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE3 11768 bytes
SHA-256: 03fcbd02e8d3363fefbade1ea9ed2e340cfb24593317bbbfd7de5a4f5c3c314d

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