Malicious PDF — malware analysis report

Static analysis result for SHA-256 926e9839325d8bcf…

MALICIOUS

PDF

68.4 KB Created: 2021-03-18 09:50:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ce8a694a3463c6cb24081bf5fb21d3d SHA-1: 7735603b542ff59644e237577c460f2f942bd1b1 SHA-256: 926e9839325d8bcfc26b619933fc46752dece3da14139b45523fedc5dc3fc246
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, with one pointing to 'resalured.ru', suggesting it's part of a phishing or malware distribution campaign. The document body is heavily obfuscated, but the presence of external links and the overall detection profile strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://resalured.ru/strik?utm_term=subway+nutrition+calculator+uk
    • http://help-verification.com/nissan_sentra_owners_manual_201410r7r.pdf
    • http://lady-bug.club/cards_against_humanity_questionsz6no2.pdf
    • http://heretythere.site/81326469205znhz6.pdf
    • http://segikusi.22web.org/wugagidirolufazujubeduta.pdf
    • https://cdn.sqhk.co/tazifawixax/3hjYrgf/cape_skins_for_minecraft.pdf
    • https://fezapatinegu.weebly.com/uploads/1/3/4/2/134266508/jazanipap.pdf
    • https://nutofagefisamav.weebly.com/uploads/1/3/5/9/135992035/9287647.pdf
    • https://lenexemumuvag.weebly.com/uploads/1/3/1/4/131438583/vikikavupifobo_mufufobajenosep_jijixuvasisi_guzozowut.pdf
    • https://linabodaku.weebly.com/uploads/1/3/1/1/131164293/sixenusideke-gotedufoj-nafiz-fudigobamawixur.pdf
    • https://cdn.sqhk.co/gixelotopa/Vihiggi/keep_the_ball_rolling_meaning_definition.pdf
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/bukene.pdf
    • http://smcjd.com/nick_saban_the_process_bookfp98s.pdf
    • https://cdn.sqhk.co/sebidurubuze/jfEkggD/wekudomagudelugeg.pdf
    • https://cdn.sqhk.co/dilobowuz/kZr8fhg/zidigimabu.pdf
    • https://cdn.sqhk.co/kosifodalab/io4gfhc/ruxojupazin.pdf
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/kebegajuzulo.pdf
    • https://bupogoduvokog.weebly.com/uploads/1/3/4/6/134690502/9ac77d317143.pdf
    • https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/xirelad.pdf
    • http://adminhalil.com/27637784909jhiu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/29392009-26b5-4d28-a6e3-04919ed25fcf/what_to_eat_for_muscle_gain_vegetarian.pdf
    • http://wulisafule.epizy.com/duzoferomubaziwowo.pdf
    • https://uploads.strikinglycdn.com/files/6788c073-4a78-443e-9898-5ca083317417/how_do_i_resync_my_summer_infant_monitor.pdf
    • https://uploads.strikinglycdn.com/files/25c0d61b-7692-4341-929e-d2318650420c/pedabig.pdf
    • https://uploads.strikinglycdn.com/files/7aace0a7-85c9-4ba0-a278-c800bb2ba328/resumen_espaa_en_el_siglo_xix_4o_eso.pdf
    • http://givimuvupavu.epizy.com/what_are_the_interview_questions_for_marketing_managers.pdf
    • http://kegotetebam.epizy.com/campbell_hausfeld_air_grease_gun_manual.pdf
    • https://uploads.strikinglycdn.com/files/46995b55-a88c-4192-b0e3-faf809d7ccf6/27144154637.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_off0000d0cb.bin
2d7246d2ed19caad0cb5a3d0c6343e2d5a91d30be67a702ace31c179a1f2727f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CB 5116 bytes
font_01_sfnt_off0000e25f.bin
2f07b3eb16a0b9e7466dd0aaa31fb3407ca688e12f27e694771e043376538552		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE25F 9448 bytes

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