Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4512d78c338c420…

MALICIOUS

PDF

78.4 KB Created: 2021-03-19 20:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d8bbb2dd40cda64779ac3eb71a5e713 SHA-1: 3b1239dc631806fa4218847c47f4537a6fd89bbd SHA-256: a4512d78c338c420a250f9534bc9331459153fab4ff55290003ed2c57ba1bc58
96 Risk Score

Malware Insights

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

The PDF file contains a URL that is likely intended to lead the user to a phishing or malware download site. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text that appears to be a lure related to a movie trailer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/123?utm_term=captain+america+the+first+avenger+trailer
    • https://cdn-cms.f-static.net/uploads/4426060/normal_604315815e969.pdf
    • https://cdn-cms.f-static.net/uploads/4426944/normal_60212e11cffa6.pdf
    • https://cdn-cms.f-static.net/uploads/4423780/normal_5fdc08b85b931.pdf
    • http://copyrighthelpcentral.com/21613364094gc7qp.pdf
    • http://teaitalis.space/classic_brick_game_free_downloadk0tyo.pdf
    • https://cdn.sqhk.co/bomagomax/Zjjifja/game_card_app.pdf
    • http://spencermcman.us/kefawulire9r4jb.pdf
    • https://cdn.sqhk.co/tajugajobib/gcxijgh/sofopifexevarabumije.pdf
    • https://cdn.sqhk.co/feripamapuv/hi28rhb/wepomodekebapamo.pdf
    • https://cdn-cms.f-static.net/uploads/4428342/normal_602112f5acb8f.pdf
    • https://cdn.sqhk.co/boxepupovemu/BjagjRt/lonerunarebu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fajeloninesitel/mpdf_background_image_fit_page.pdf
    • https://s3.amazonaws.com/mubemutolewe/wevatafasexuxo.pdf
    • https://s3.amazonaws.com/juzewojavomofew/why_is_my_honeywell_thermostat_locked.pdf
    • https://s3.amazonaws.com/jutenojamega/17217065740.pdf
    • https://s3.amazonaws.com/fajixe/sudoxesinenavexaru.pdf
    • https://s3.amazonaws.com/widuxade/biscoito_de_arroz_integral_camil_informao_nutricional.pdf
    • https://s3.amazonaws.com/werowibovezoje/static_and_dynamic_surface_tension_measurements.pdf
    • https://s3.amazonaws.com/sowewazulejewi/lomuvemutireb.pdf
    • https://s3.amazonaws.com/rodigapigeta/life_skills_worksheets_for_grade_3.pdf
    • https://s3.amazonaws.com/ganubifirigevi/61906551519.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f42f.bin
934432a73a552e9fd0e27ec3d1d16c3523b56089af65139f08ca796f4697a85c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF42F 5396 bytes
font_01_sfnt_off0001066c.bin
758a740fab80a25ef450d99d3187054ce1a3127f348112476644c6779f9d1bdd
pdf-font-stream PDF embedded font (sfnt) at offset 0x1066C 11264 bytes