Malicious PDF — malware analysis report

Static analysis result for SHA-256 05faf5b8d96fedc8…

MALICIOUS

PDF

89.3 KB Created: 2021-05-11 22:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 551c05fc095599f2ec75468eb96b6cac SHA-1: 5a8fe8940a07b2e47fec9285ed806ad7415fbcc4 SHA-256: 05faf5b8d96fedc8a286a02c8620991ec577444644132550fe661433a0374229
126 Risk Score

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 0.9993

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://pelibifir.ru/strik?utm_term=signs+of+high+functioning+autism+in+adults+reddit PDF link annotation
    • http://xefawojuj.mygamesonline.org/descargar_libros_de_vargas_llosa.pdfIn PDF document text
    • http://aycotoro0.xyz/75275202405mo237.pdfIn PDF document text
    • http://lojasamericanasbr.com/muserag07h71.pdfIn PDF document text
    • http://pedrons.space/Studen_jedna_apotamkin_knihaq2umv.pdfIn PDF document text
    • http://pinenud.mygamesonline.org/bangalore_duty_free_price_list.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/jhgewCz/connect_fltplan_go_to_fs2020.pdfIn PDF document text
    • http://tasiperop.medianewsonline.com/92915588209.pdfIn PDF document text
    • http://suwadebizon.mywebcommunity.org/bikonakejut.pdfIn PDF document text
    • http://gelupulofevabek.medianewsonline.com/61053346454.pdfIn PDF document text
    • http://vijepuwobewi.mygamesonline.org/walmart_retail_pre_employment_assessment_test_answers.pdfIn PDF document text
    • http://clubstore.pro/ankhon_dekhi_full_movie_in_720pcnzfq.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/komof.pdfIn PDF document text
    • https://cdn.sqhk.co/tikisudolo/3Onl3wH/93298797996.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/list_of_engineering_colleges_in_bangalore_with_address.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/vamobalinejasusa.pdfIn PDF document text
    • http://luloxijemise.medianewsonline.com/fuvajizomaworatagi.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/call_of_cthulhu_board_game.pdfIn PDF document text
    • http://tamogulaganero.scienceontheweb.net/becoming_michelle_obama_english.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/Kiichi1/pukejobiv.pdfIn PDF document text
    • http://vevaroda.scienceontheweb.net/vaxufax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikubub.onlinewebshop.net/70691464868.pdfIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_838238d191054ec1b99f81c922807da7.pdf?index=trueIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_852141284c874bb19121b69596021226.pdf?index=trueIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_4fc8d9e300474268b557c0bbe6fc4711.pdf?index=trueIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_eb1b3ef7aa384128b4ad0813d3e935e6.pdf?index=trueIn 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_off0001213a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213A 5540 bytes
SHA-256: 3efe03aa275b05709da32a9c6c1031b3be9a184b312650f1b81f3d482311ee1b
font_01_sfnt_off000133e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E5 10636 bytes
SHA-256: a71ef062ae90c2d6cf7db8c1c465ad197e106856b98ec0a3feb068142c431553

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