Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2d2e3502df1f69…

MALICIOUS

PDF

80.1 KB Created: 2021-03-08 01:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6ea9c05bd3e4628645de6a5bbd7afb00 SHA-1: 63debd292d5a7faedc1243b92ae3bf2356470c2e SHA-256: 9a2d2e3502df1f6966beb99caf1ad0cb0ba265e722fa3950cedd4998fa7c07d3
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external URIs, including one pointing to 'golowaki.ru', suggesting it is designed to redirect users to potentially harmful websites. The presence of multiple disposable hosting links further indicates a phishing or malware distribution attempt.

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://golowaki.ru/wix?keyword=exponent+power+rule+worksheet+pdf PDF link annotation
    • https://filokizufotol.weebly.com/uploads/1/3/4/4/134455434/7303635.pdfIn PDF document text
    • https://cdn.sqhk.co/degamuwubela/gchbjeG/ates_ve_su_2015_meb_oyun.pdfIn PDF document text
    • http://bestsalestoday.xyz/rudupok8zbw.pdfIn PDF document text
    • https://cdn.sqhk.co/fivodewile/iiibibu/garesipetoma.pdfIn PDF document text
    • http://winsl.space/73231007476khmpu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419235/normal_5fdcdbf561da3.pdfIn PDF document text
    • https://diniporugixufov.weebly.com/uploads/1/3/1/8/131856235/kelerixex-sajowul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490380/normal_5ff10d2696d69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_6023e0890bbe4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387702/normal_5ff2c67d3b77a.pdfIn PDF document text
    • http://bupro.asia/wogesiwasfb85f.pdfIn PDF document text
    • https://fetesebi.weebly.com/uploads/1/3/4/8/134896421/caf267cf5e159af.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/gjhejji/rowdy_wrestling_hack_mod_apk.pdfIn PDF document text
    • http://vesibigezedenu.iblogger.org/koguzujikesix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/debiwelof/81731056857.pdfIn PDF document text
    • http://sobakijej.rf.gd/teetar_bird_sound.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/where_can_i_donate_toys_in_los_angeles.pdfIn PDF document text
    • http://pifimopumo.rf.gd/6561145309.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/daniel_fast_weekly_meal_planning_sheet.pdfIn PDF document text
    • http://wojixefem.epizy.com/kekaxugeziziniso.pdfIn PDF document text
    • http://lojokedasu.rf.gd/back_formation_slideshare.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/cold_air_intake_performance_difference.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/brush_set_for_photoshop_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_off0000fcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC1 5100 bytes
SHA-256: 072f95b23bf8907d9887371e43f2d4c972b809f9aa8d4642b65f58ae751eb1bd
font_01_sfnt_off00010e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2D 10768 bytes
SHA-256: 77e4eb231dded7f67c3875e51254ff03a4fb9cb30804f89e46f3a5a29e775dd5

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