Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce254b8563306356…

MALICIOUS

PDF

72.5 KB Created: 2021-03-29 03:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2ed848009fa2f58e9633acf76e04557e SHA-1: 8941bd576a324fb8d1264a2a3ed95c9ca906d04e SHA-256: ce254b8563306356a90260ad4fbc30571d47ac7a9a10740a700ef5f16168be0b
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary external URI points to a URL with a 'how to reset' query, likely a lure for a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://jumiwimov.ru/strik?utm_term=how+to+reset+rheem+gladiator+water+heater PDF link annotation
    • http://vnatural.space/then_and_than_commonly_confused_words_worksheets7uww.pdfIn PDF document text
    • https://daxivikulogator.weebly.com/uploads/1/3/4/3/134308382/posinujet-getopakep.pdfIn PDF document text
    • https://nogojajefe.weebly.com/uploads/1/3/5/3/135314992/475856.pdfIn PDF document text
    • http://moitender.org/84583639768q0b4t.pdfIn PDF document text
    • http://help-copyrightservice.xyz/data_frog_retro_game_consoleo67bu.pdfIn PDF document text
    • https://gorokose.weebly.com/uploads/1/3/4/0/134042322/tezitofizug.pdfIn PDF document text
    • http://profapp.pro/garmin_gpsmap_60csx_software_updatepvf3m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446507/normal_602c3d8216945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_60274c5f50457.pdfIn PDF document text
    • http://helpcreditscore.info/starfinder_character_sheet_downloadu3g40.pdfIn PDF document text
    • http://scoretdho.best/danusodagoganeterarubo86jz.pdfIn PDF document text
    • http://tvoy-ogorod.online/ecuaciones_lineales_de_primer_grado_ejemplos_faciles0h9m0.pdfIn PDF document text
    • http://stankoff.org/lazexatevejisedibgmd0t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479445/normal_6015a584681fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_605f5e581cf94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_1b090f5ac61f458e9ac69a6ed90f2dec.pdf?index=trueIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_0fbf872678ed4485a15aab98dee34dc3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xefejevife/are_sonic_breakfast_burritos_healthy.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/amazon_web_services_tutorial_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/application_format_for_police_complaint_in_urdu.pdfIn PDF document text
    • https://cd8fad78-6a19-43c6-878c-830d169ee42d.filesusr.com/ugd/ff0d91_ea3ccc728a824156b6d178e8252317fa.pdf?index=trueIn 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_off0000df3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3B 5292 bytes
SHA-256: c4f09fdd692604721ad96bb089a2108584781ee69e1eb88683d0cece651b1d5a
font_01_sfnt_off0000f11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11A 10256 bytes
SHA-256: bccd2aa590896d4c26f6ef339339b97fa0773e2e9ce88ed28a3bb1b02655011a