Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb46e47a9e19cfa…

MALICIOUS

PDF

80.5 KB Created: 2021-03-09 00:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2e551becc3dcaf65bb84f71614db7b88 SHA-1: 86910038034b12befcfbc4215cc03b47a6427b55 SHA-256: bfb46e47a9e19cfa2f426700e89496885bd7344079df3b61f96c64ee5079e012
126 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 or trojan variant. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, aiming to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/123?utm_term=appendix+1%252F+45+form PDF link annotation
    • http://graatorama.fun/dowavamarixomt3jux.pdfIn PDF document text
    • http://fallofelin.online/star_wars_counted_cross_stitch_patternspyqrv.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/john_bender_the_breakfast_club_character_analysispp0h0.pdfIn PDF document text
    • http://pipvip.ru/file_manager_apk_crackedonct0.pdfIn PDF document text
    • https://xebutikud.weebly.com/uploads/1/3/0/8/130813588/43e0c5fe702.pdfIn PDF document text
    • http://cosmeteca.com/ropaxabipigonusukol75l8g.pdfIn PDF document text
    • https://gedesinikus.weebly.com/uploads/1/3/5/3/135323437/96a6b27250.pdfIn PDF document text
    • http://latencfsrt.space/manager_for_macb9l2o.pdfIn PDF document text
    • http://yourbigdick.space/69222200749ntqs6.pdfIn PDF document text
    • https://kadexatazi.weebly.com/uploads/1/3/4/6/134648676/xuxefavumafozil-sirakekisa-tebetu.pdfIn PDF document text
    • http://gitikevajup.iblogger.org/affairscloud_feb_2019.pdfIn PDF document text
    • http://itrom.fun/honda_gx340_parts_list6qhkb.pdfIn PDF document text
    • http://praktika-ingenieur.com/is_a_fitbit_versa_worth_itditjt.pdfIn PDF document text
    • http://2220202.ru/jelurodoramuzuzt5x3.pdfIn PDF document text
    • http://apkweb.net/38855694111gyo0h.pdfIn PDF document text
    • https://libepuve.weebly.com/uploads/1/3/1/4/131407284/5976259.pdfIn PDF document text
    • https://kolojadulosa.weebly.com/uploads/1/3/1/3/131397946/kofuwamomipoxakozowo.pdfIn PDF document text
    • http://elinekici.online/6682072369b60f2.pdfIn PDF document text
    • http://help-business-media.com/altivar_320_manual_portuguesa0lw5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fegugeg.rf.gd/free_resume_templates_microsoft_word_2017.pdfIn PDF document text
    • http://fojamemu.epizy.com/windows_7_loader_application.pdfIn PDF document text
    • http://lapakak.rf.gd/one_dimensional_collisions_physics_lab_report.pdfIn PDF document text
    • http://fudavifakafolid.rf.gd/magazine_template_wordpress_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3F 5124 bytes
SHA-256: 82d92c44157fc95ad3e71adab861b8f6f97465bdf5126b00b4a657bbfd06f347
font_01_sfnt_off00010ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBD 11392 bytes
SHA-256: 10f932115fddb68e22ee1c7ad6809af0621ec82af26905c6c2073b23a1b57903

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