Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9b803f8ca12ccf1…

MALICIOUS

PDF

74.9 KB Created: 2021-04-05 07:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a921c35fe9e3f44598fd8300cee485d SHA-1: f11608ad2b928aac8eb58e3dc57a1fe2ac4563a6 SHA-256: c9b803f8ca12ccf1001c91bdffa815262100fa269ecbeca555f13c6f93e2858f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'bologen.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be related to the embedded URI's keyword, suggesting a lure to trick users into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=skilsaw+model+77+parts
    • https://manasuma.weebly.com/uploads/1/3/0/8/130873954/metok_dusis_jogirabesarizu.pdf
    • https://mikatafa.weebly.com/uploads/1/3/1/3/131398449/6886405.pdf
    • http://golivexi.22web.org/python_coding_interview_questions_and_answers.pdf
    • https://cdn.sqhk.co/pitekofotada/ijib3ii/ringtones_free_download_telugu_love.pdf
    • http://puwexakibo.iblogger.org/banjara_video_song_number_padal_ing.pdf
    • http://nuvoked.22web.org/opening_gap_trading_strategies.pdf
    • https://cdn.sqhk.co/wusirilunoko/olyRLr3/birla_sun_life_mutual_fund_stp_form.pdf
    • http://mantenancie.com/33183131748v7zp.pdf
    • http://soldatskaya6.ru/kasuwuwawati6kt0f.pdf
    • http://zavudonalu.66ghz.com/algebraic_manipulation_worksheet.pdf
    • http://pojegan.22web.org/how_to_use_self_clean_on_ge_true_temp_oven.pdf
    • http://redpandarecycling.com/6386593859865evr.pdf
    • https://cdn.sqhk.co/matajikiwov/Kjhhcya/nijapedi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_3f878e7922d44df6a0aaedb78b8b2ab7.pdf?index=true
    • http://zewedazogiwake.rf.gd/89230805244.pdf
    • http://taxisariwoboduz.epizy.com/gefijadejafol.pdf
    • http://zimipasazodid.rf.gd/what_is_normal_color_deficiency.pdf
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_c1e3ebeddd2446e2a354f4cc0665ac9f.pdf?index=true
    • https://0bc2ebcf-5b85-435c-8290-6c6350a165f2.filesusr.com/ugd/ee98f5_6d3c7a3a0edc4d2c89f249315c28f44a.pdf?index=true
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_13ac2b3945224cd497070d63172f2b2d.pdf?index=true
    • http://jegigas.epizy.com/call_me_by_your_name_trailer_subtitulado.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_off0000e70b.bin
a64acd4229c2a4252f73e96eb04e214b45722b512399734e40ff824691a9bba1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE70B 5444 bytes
font_01_sfnt_off0000f999.bin
5730b9f768d08f12a78731225baf110afc40155beb0a42f2292fb53fb53eaf88
pdf-font-stream PDF embedded font (sfnt) at offset 0xF999 10312 bytes