Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae7b9d4f1a14d2c…

MALICIOUS

PDF

72.5 KB Created: 2021-03-31 17:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 026a50c4e98ba91612db06aeef13c282 SHA-1: 5700ef3070d1a78ecc6971c041f75f5b2a2df25b SHA-256: 7ae7b9d4f1a14d2c236f1c1632025fd301ac763f72bbff6f3b29f5b015b29282
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains multiple embedded URLs pointing to suspicious PDF files, suggesting it is part of a phishing campaign. The document body, though heavily obfuscated, contains keywords related to a service manual, likely used as a lure. The presence of external URIs indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/strik?utm_term=delonghi+magnifica+s+service+manual
    • http://good-production20.site/giviralopami8lg58.pdf
    • https://farazekij.weebly.com/uploads/1/3/4/3/134379469/sopavolofobu.pdf
    • https://doxefifuz.weebly.com/uploads/1/3/0/9/130969363/38aaba2b24c17c.pdf
    • https://kukedinuril.weebly.com/uploads/1/3/5/3/135326584/3427478.pdf
    • http://genusttwsr.fun/vumoduwujekogirulczj9e.pdf
    • http://serviceforyou.site/who_wrote_the_quran_and_how_was_it_put_together_in_urduwl2v9.pdf
    • http://galoomer.online/zixawatolizunitobfe.pdf
    • https://cdn.sqhk.co/niwexifa/TGchf7l/girugimexekek.pdf
    • https://cdn.sqhk.co/xopuxuvop/gcCijct/banco_bradesco_av_estados_unidos.pdf
    • https://cdn-cms.f-static.net/uploads/4387242/normal_603eb4eaf0999.pdf
    • http://vashobereg.com/87593162075farwc.pdf
    • http://options.expert/la_divina_comedia_dante_alighieri_pelicula_online0le09.pdf
    • http://otshelnik.net/plc_course_in_coimbatoreblsn0.pdf
    • http://help-feedback-amzn6.xyz/60908883351rknej.pdf
    • http://biweekamnf.com/how_to_set_time_on_casio_radio_controlled_watchjrcpg.pdf
    • https://cdn.sqhk.co/suxunuke/cqgddib/89018718406.pdf
    • https://kaxupigokib.weebly.com/uploads/1/3/5/3/135324743/dofumurinuxusutina.pdf
    • http://photoforce.ru/whats_the_best_selfie_stick_to_buyqg72g.pdf
    • http://reduslim-buy.site/189064893881o1yh.pdf
    • https://cdn-cms.f-static.net/uploads/4372377/normal_6039b3ca3f56c.pdf
    • http://kfnwejfnkwheklf.space/suxorosuruxebukidu5dftc.pdf
    • http://you-bestshop.xyz/59089682650ae3qk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000df50.bin
f89f1f4794087230d4bd4e9d7ed5cc98d0bf5ac11a0ac1ed217a7571a3d7840d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF50 5356 bytes
font_01_sfnt_off0000f167.bin
5acde50fc7aa2ca399eb0f8a69db33482cc6a11a2ba816ba5ff417e662c962db
pdf-font-stream PDF embedded font (sfnt) at offset 0xF167 10412 bytes