Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b69f6e56b2f64e…

MALICIOUS

PDF

90.4 KB Created: 2021-05-06 11:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 621ab357058b36fa794bab4efa6d22c2 SHA-1: 7d7cf9ccca61554a8be641493e3e4f9dd0cccfb0 SHA-256: 32b69f6e56b2f64ebdef08bf8200d347f3a105482f21912df3d90eaff1c9000f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable hosting and exhibiting link farm characteristics, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further corroborate its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely leading to a second-stage download or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=new+market+wizards+summary
    • http://vizazovabula.mywebcommunity.org/phlebitis_adalah.pdf
    • http://dujojiwasemob.mywebcommunity.org/79937186599.pdf
    • https://zanobevaduj.weebly.com/uploads/1/3/2/6/132682049/7203840.pdf
    • http://jirusulixozome.scienceontheweb.net/abecedario_completo_para_nios.pdf
    • http://filuxunokenobud.mygamesonline.org/daderila.pdf
    • http://vazawujuzu.sportsontheweb.net/boss_fs-5u_fs-6_fs-7.pdf
    • https://tevupiju.weebly.com/uploads/1/3/4/8/134865653/gurizimolupu.pdf
    • https://biwoponafi.weebly.com/uploads/1/3/4/7/134767969/6833316.pdf
    • https://mokabeninenaji.weebly.com/uploads/1/3/4/0/134013120/b9d859c19d4c996.pdf
    • http://wifunagidoli.mypressonline.com/tecumseh_5hp_engine_shaft_size.pdf
    • http://prizinsta24.online/karnataka_cet_2019_physics_answer_keyae9aa.pdf
    • http://linavaluviriv.getenjoyment.net/andromaque_rsum.pdf
    • https://risenezapaf.weebly.com/uploads/1/3/4/4/134481661/5328592.pdf
    • http://warokibujiz.getenjoyment.net/best_healthy_smoothie_recipes.pdf
    • http://arendagg.xyz/relion_blood_pressure_monitor_hem-741creln2_manualo2qrh.pdf
    • http://lokotahas.ru/66129997042tslmx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tarizirefevifab/83900784121.pdf
    • https://s3.amazonaws.com/woxorojero/l298n_ic_datasheet.pdf
    • http://nabenejajoko.myartsonline.com/calendario_tributario_barranquilla_2020.pdf
    • http://gamojusefefojor.epizy.com/sat_subject_test_math_2_online_practice.pdf
    • http://totuxivez.onlinewebshop.net/balancing_simple_chemical_equations.pdf
    • https://s3.amazonaws.com/dosipive/xemetigu.pdf
    • https://s3.amazonaws.com/kuxuxemu/meramec_springs_fishing_report.pdf
    • http://fomajunelafid.epizy.com/bopidoxumo.pdf
    • http://jeliponotetivek.epizy.com/jifoku.pdf
    • http://paxubar.rf.gd/40846737967.pdf
    • http://mulagokonud.rf.gd/76241620951.pdf
    • https://s3.amazonaws.com/xugigabitulu/55825254020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011731.bin
374f57b359aa6c3a97448d9a5d09c01b033fbfc0042f4251242743998859de2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11731 4884 bytes
font_01_sfnt_off000127e8.bin
424e160a043c52a85d9d5380459d058ef01ce3b1c88cb5749b0071b92dc27892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127E8 11592 bytes
font_02_sfnt_off00014ed6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED6 4324 bytes

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