Malicious PDF — malware analysis report

Static analysis result for SHA-256 301c74891d6f7b64…

MALICIOUS

PDF

81.6 KB Created: 2021-06-08 18:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 117b10b05b5efd4d922597d4ab859675 SHA-1: b629ee221ace4a09d276d55c01347493079d5ccb SHA-256: 301c74891d6f7b6458779839a2539e1d69bdbe2d159351a29a1ba73ac418803b
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 0.9995

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://catamma.ru/pbw?utm_term=reported+speech+exercises+for+class+10+cbse PDF link annotation
    • https://punelita.weebly.com/uploads/1/3/4/6/134679726/negemeta_jatezuku_bafali_tawojutukoro.pdfIn PDF document text
    • https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/devuvuvazufunanufowu.pdfIn PDF document text
    • https://vusesuke.weebly.com/uploads/1/3/4/7/134723580/sarivasutojor-renenowu.pdfIn PDF document text
    • https://zafasasuk.weebly.com/uploads/1/3/4/7/134713251/205dfa.pdfIn PDF document text
    • https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/ae7c9e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wamotarirup.pbworks.com/w/file/fetch/144668967/2019_pba_tournament_of_champions_results.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/w/file/fetch/144600822/tegowusijenojetaxo.pdfIn PDF document text
    • http://ritijix.pbworks.com/f/97814204555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e92e1f96-8dda-4aa4-9b29-894f944bd791/is_lexus_f_sport_worth_it.pdfIn PDF document text
    • http://nunaruribeg.pbworks.com/w/file/fetch/144615732/6124251123.pdfIn PDF document text
    • http://moxulolo.pbworks.com/f/modals_of_deduction_must_can_might_may_could_exercises.pdfIn PDF document text
    • http://sajateves.pbworks.com/w/file/fetch/144463548/little_seagull_handbook_with_exercises_chegg.pdfIn PDF document text
    • http://wozixokumo.pbworks.com/w/file/fetch/144869715/how_to_be_rich_in_avakin_life_2020.pdfIn PDF document text
    • http://kuzimotum.pbworks.com/f/32382584561.pdfIn PDF document text
    • http://werinenimuta.pbworks.com/w/file/fetch/144523497/autotrader_florida_trucks.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/w/file/fetch/144436620/tyt_basit_eitsizlikler_km_sorular.pdfIn PDF document text
    • http://dusozivelas.pbworks.com/w/file/fetch/144878007/milenge_tumko_to_batayenge_o_sahiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da50a3e2-cc8a-44a9-aaba-078b9e05f55a/what_is_the_best_thing_at_taco_bell.pdfIn PDF document text
    • http://tufukamapaf.pbworks.com/f/bulemakatuzumitida.pdfIn PDF document text
    • http://lomexalipele.pbworks.com/f/34701298812.pdfIn PDF document text
    • http://xetibubib.pbworks.com/w/file/fetch/144425430/49670497187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d5096a2-2a01-4df2-869f-a43cf6517165/19732471414.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF167 5336 bytes
SHA-256: e9c4c11c2a1c4fb6c2f351c3bf0fb8bfcca5f5cb2a609ef2de1e7aeefb20cc79
font_01_sfnt_off000103a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A9 11148 bytes
SHA-256: a7ebcab5131aa826a0d46d0eff61833fc491f6d1e0bf1a5820c8a188360b17fb
font_02_sfnt_off000128d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f