Malicious PDF — malware analysis report

Static analysis result for SHA-256 e87d913d5eb9aa1f…

MALICIOUS

PDF

81.5 KB Created: 2021-04-27 04:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a30f7185999dc218dbe7edecf5d58e9 SHA-1: 4b0dfd9a9568db990964e80877e13d7a04b86ecc SHA-256: e87d913d5eb9aa1fb762bd47a88b98c1d3e8a3d6c217948660a2b7c23f3c3ecf
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'zajinet.ru', likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/strik?utm_term=drinks+to+make+with+crown+royal+regal+apple
    • http://pifedalune.medianewsonline.com/lubolifajepazometamuru.pdf
    • https://cdn.sqhk.co/wukopojenava/bSGuil9/89719077761.pdf
    • https://cdn-cms.f-static.net/uploads/4408586/normal_602b51001fcbb.pdf
    • http://ludesajezopaju.medianewsonline.com/advantages_of_using_technology_in_education.pdf
    • https://warexuzema.weebly.com/uploads/1/3/4/6/134601764/340f3.pdf
    • https://cdn-cms.f-static.net/uploads/4457272/normal_60406249d6e20.pdf
    • https://cdn.sqhk.co/vaxizavex/HNkhcgh/93382901465.pdf
    • http://docita.fun/nebukuwusebuwadaki71var.pdf
    • http://narosisebono.22web.org/bertakhta_di_hati.pdf
    • http://citruss.space/fapeloloserifog48.pdf
    • https://cdn.sqhk.co/fujonexa/ajd3geR/rilakkuma_farm_hack.pdf
    • https://xudixakutax.weebly.com/uploads/1/3/0/7/130776611/1539884.pdf
    • http://hookup153.online/nuvadexexabezunagoks44dk.pdf
    • http://demubowigipuwi.22web.org/43062945919.pdf
    • http://gsmall.space/download_muskets_of_america_modyrve1.pdf
    • http://tajuliwelofiti.medianewsonline.com/bandler_richard.pdf
    • https://cdn.sqhk.co/pamavunawi/RihjDod/88632374332.pdf
    • https://tawigijonepoter.weebly.com/uploads/1/3/4/0/134012415/fojumarene.pdf
    • https://cdn.sqhk.co/tosuwukiwate/G56ygc9/face_masks_for_sale_near_me_cvs.pdf
    • http://torevifij.iblogger.org/17599715310.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zokepufa.epizy.com/break_even_analysis_chart.pdf
    • http://wudazebej.atwebpages.com/kesuwajuwuvajajibubel.pdf
    • http://suwuriru.onlinewebshop.net/35799667950.pdf
    • http://joluluseliwawi.rf.gd/homeostasis_a_level_notes.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_off0000fd67.bin
21a8add6a4c7e8717105210987cb6823f1c0fdee19b3ebbc2bfc074681f2b99b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD67 5604 bytes
font_01_sfnt_off0001106d.bin
8edcf67d2d1c9307c375cdd395186c5c6faa50202a301712c76a7291a608768f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1106D 11224 bytes