Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd875df2622fde2e…

MALICIOUS

PDF

80.5 KB Created: 2021-03-14 20:02:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4ed46fdd2387bfda096d60f94b504a52 SHA-1: b8e69f2a2c0cd4c5180651f9a6d0b5a3c29e6ca6 SHA-256: bd875df2622fde2e2346555a276f3e56c6151bfe947057116bddc43c4b7d0e09
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 0.9991

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://botokaw.ru/wix?keyword=spss+survival+manual+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4423145/normal_5fec3bace1d87.pdfIn PDF document text
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/0d2372ccb494c.pdfIn PDF document text
    • https://sinuvuliwazima.weebly.com/uploads/1/3/1/8/131871572/3768316.pdfIn PDF document text
    • http://love-your-lips.online/724549362506k85x.pdfIn PDF document text
    • https://jatilesaza.weebly.com/uploads/1/3/4/3/134316516/lodukomokoxonuwomebi.pdfIn PDF document text
    • http://hydrofthol.space/casio_aq-s800wd-1evdf_manualhav1e.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/o7f04hj/jemugeletez.pdfIn PDF document text
    • https://cdn.sqhk.co/fufitefan/5naSiiU/68889871288.pdfIn PDF document text
    • http://magnifioco.site/4.3_mercruiser_oil_filter_framk6yj4.pdfIn PDF document text
    • https://cdn.sqhk.co/mokavokaven/egeihnZ/sakuzevizirigoga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389097/normal_60115150c522f.pdfIn PDF document text
    • http://nebofonuve.mywebcommunity.org/jekilezodamukinuzoveto.pdfIn PDF document text
    • http://inertbhjbj.ru/pathfinder_adventure_path_hellknight_hillorujf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464055/normal_603facd3ce0a8.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/who_was_the_first_person_to_view_the_walls_of_the_cellar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501383/normal_6003a9439d9f9.pdfIn PDF document text
    • http://mimivamefigupe.sportsontheweb.net/vovonosesu.pdfIn PDF document text
    • http://ericksandoval.com/fisher_papa_bear_wood_stove_manualq9sc7.pdfIn PDF document text
    • https://dugitesabisaxo.weebly.com/uploads/1/3/4/3/134392589/fezofofo-kifege-migitewurexav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jumawivowibeb.onlinewebshop.net/tiligiletapemodevajen.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/dalal_simplified_icse_chemistry_class_9_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/que_es_pragmatismo_y_ejemplos.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/situational_interview_questions_and_answers_for_executive_assistants.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85D 5348 bytes
SHA-256: cf374d394fd43a7488310dcaca45b24403a46c3be5c61a25fc15cd1305b9d21b
font_01_sfnt_off0000fa7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7A 10692 bytes
SHA-256: deb726dc749b08c3430f555acfa3edc7faf5b36a50eb033382719c7ce26c77ab
font_02_sfnt_off00011f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3A 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449