Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe283fa6ea3d2868…

MALICIOUS

PDF

80.5 KB Created: 2021-04-23 16:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4df8b70addde74b4d4cbf1c22292652e SHA-1: bdea83a7958d9865a8b1401b319e19fd0f33d649 SHA-256: fe283fa6ea3d2868ba3073ba3c7c1b4c40abf000259d794581d385b124dee702
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a common tactic for SEO spam and phishing. One of the primary URLs, 'https://jumiwimov.ru/strik?utm_term=beats+3+solo+price', appears to be a lure for users searching for 'Beats 3 solo price'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=beats+3+solo+price
    • http://bumefivaloso.scienceontheweb.net/44506013679.pdf
    • https://vevuduwas.weebly.com/uploads/1/3/0/7/130775740/a78a2d6b46002.pdf
    • http://luzupogakij.sportsontheweb.net/memipigam.pdf
    • https://jilarikogezinuv.weebly.com/uploads/1/3/0/9/130969280/bajozez_migofixasuba_nukikemejef_makomamam.pdf
    • https://bolumuratojepo.weebly.com/uploads/1/3/4/7/134749128/b64cd862378bc7.pdf
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/delawelovojiwijuti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fotepopunaj/39851718454.pdf
    • https://s3.amazonaws.com/fisulefajow/lightroom_5_shortcuts.pdf
    • http://pevogikuxupeja.onlinewebshop.net/wibixerosiri.pdf
    • https://uploads.strikinglycdn.com/files/14e82732-3766-4207-8314-bcdb7bd24251/buzisinuxakomis.pdf
    • https://uploads.strikinglycdn.com/files/d92b6eef-243f-4adc-8284-76f064000671/duzokiganamedip.pdf
    • https://uploads.strikinglycdn.com/files/0a7d039f-6c51-4e1a-92aa-d6261a19c1eb/bebakixabamipajurekiko.pdf
    • https://uploads.strikinglycdn.com/files/33dc0add-8ffc-44be-a6aa-d2782b149226/kenmore_washer_service_near_me.pdf
    • https://uploads.strikinglycdn.com/files/3c89560b-1ba9-4c3a-bd54-1cf1c3e9b335/desde_que_edad_se_puede_empezar_a_tomar_colageno.pdf
    • https://uploads.strikinglycdn.com/files/6641b26c-4d83-4f16-a702-6ef51cb5de77/fitbit_charge_3_case_amazon.pdf
    • http://kosezofejesuxef.atwebpages.com/agile_project_management_for_dummies_cheat_sheet.pdf
    • https://s3.amazonaws.com/vigevot/microsoft_team_foundation_server_tutorial.pdf
    • https://s3.amazonaws.com/tiduro/29147739157.pdf
    • https://s3.amazonaws.com/pigolo/vozenod.pdf
    • https://uploads.strikinglycdn.com/files/43a1afc2-8c3f-4ed6-b829-9ab57f19dddd/health_and_safety_breaches_at_work_examples.pdf
    • https://s3.amazonaws.com/punagilelabon/60347563473.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_off0000fa25.bin
261c731199273711ae45a17272f7d129b6811fe43280a857cb0db61218aae5b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA25 5140 bytes
font_01_sfnt_off00010bab.bin
99bcbc8cdd5159ad5800cfd21ef14839eedf200372256e2ce8672ff4b90a9433		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAB 12508 bytes

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