Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff488f3fee5e133…

MALICIOUS

PDF

74.2 KB Created: 2021-03-25 18:26:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d7721706dbcdcb609dde06c19a3d92d SHA-1: d438a5fac4dd94e1b3fcce7c6596537337b163d5 SHA-256: 3ff488f3fee5e13385233ac3f59c4a2a031ddae4065fede69d1d67e0a093f4a0
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing lure. The document body, though heavily obfuscated, appears to be related to a search query, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=how+many+calories+in+potato+rolled+tacos
    • https://static.s123-cdn-static.com/uploads/4385028/normal_5ff9eb6b262c6.pdf
    • http://storeyou.store/history_of_art_therapy_in_the_united_statesh4t48.pdf
    • https://cdn-cms.f-static.net/uploads/4446507/normal_603635e59adcd.pdf
    • http://nextauto02.ru/17700356892681ry.pdf
    • http://strapslap.online/vedanojesojisusiclviv.pdf
    • http://nuwoxope.iblogger.org/8349085088.pdf
    • https://cdn-cms.f-static.net/uploads/4425910/normal_6049cc6ae564b.pdf
    • http://tovarajuxelogag.iblogger.org/bijifapewejek.pdf
    • http://argo-tourism.com/average_salary_of_software_developer_in_usapxzmr.pdf
    • https://static.s123-cdn-static.com/uploads/4408992/normal_60079e58a7c27.pdf
    • http://lisipezasuk.iblogger.org/animation_movie_maker_software_free_download_for_windows_10.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://weforonezanofo.epizy.com/47046461723.pdf
    • https://s3.amazonaws.com/rilexazejuzovep/alexandre_o_grande_filme.pdf
    • http://pagosunizuboroz.epizy.com/menateviwokepof.pdf
    • http://deroselewem.epizy.com/mixofekabopuwavokobisot.pdf
    • http://fiwixetigimizi.rf.gd/90318413385.pdf
    • http://turegipamikum.epizy.com/1549409284.pdf
    • https://s3.amazonaws.com/woberiz/still_i_rise_poem_analysis_figurative_language.pdf
    • http://mawabubobiniz.rf.gd/83975417396.pdf
    • https://s3.amazonaws.com/wizomoravazub/fisuxefawaledomo.pdf
    • http://rafoputoxuxu.epizy.com/lenudapalikenukiwibi.pdf
    • https://s3.amazonaws.com/tigewibejageju/gijunofevobu.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_off0000e4ab.bin
3142e479bab28eacea5987bdf83b47e3d4eeaed81f0330ce902b3442a4c9b635
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AB 5376 bytes
font_01_sfnt_off0000f6eb.bin
528b04edbc772d0205d3ffeafafcabb3ecad60d9d2a1552fd8a43ea9771c7abc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EB 10692 bytes