Malicious PDF — malware analysis report

Static analysis result for SHA-256 655de1a3017208b4…

MALICIOUS

PDF

71.3 KB Created: 2021-03-25 04:19:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cccf16208b7b4d3578a906272ce5974c SHA-1: c9addd163707024398c3c0a0bc7c659a7774c918 SHA-256: 655de1a3017208b4379ed6b01f6b7b15d6404008baa96aef1fd53e86b02679f5
126 Risk Score

Malware Insights

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

The PDF file contains multiple external URIs, with one specifically pointing to a domain associated with phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/award?keyword=convertir+un+pdf+a+word+editable+gratis PDF link annotation
    • https://tojaxufuvubugo.weebly.com/uploads/1/3/4/6/134641466/1790850.pdfIn PDF document text
    • https://jowavuzawevubab.weebly.com/uploads/1/3/2/3/132303017/xokakojowaxofivoxapa.pdfIn PDF document text
    • http://reliables.ru/husqvarna_chainsaw_455_rancher_carburetort2bjq.pdfIn PDF document text
    • https://cdn.sqhk.co/xewumoxu/hjgcw8E/gilugepavevokawaxujo.pdfIn PDF document text
    • https://cdn.sqhk.co/bepotedaxus/jdsgfmt/counter_strike_source_euphoria_ragdoll.pdfIn PDF document text
    • http://igoscandinavia.com/kaladubonosejakizazoxc1j.pdfIn PDF document text
    • http://aduo5.online/texodevezutebig0.pdfIn PDF document text
    • https://widawukilifuduz.weebly.com/uploads/1/3/5/3/135398171/tirifofod.pdfIn PDF document text
    • https://cdn.sqhk.co/matikefateri/jeEE0hi/wikorakufirinikigugosog.pdfIn PDF document text
    • https://terifurarogo.weebly.com/uploads/1/3/4/3/134317228/wiwimilano_merifatefu_vufoxile_lazijila.pdfIn PDF document text
    • http://kprovk.xyz/410793270795uoos.pdfIn PDF document text
    • https://mewurotimopu.weebly.com/uploads/1/3/1/3/131381658/radebe_duninuviridos_woletotaduzedok_dowobizo.pdfIn PDF document text
    • http://bigmagazin.xyz/juwijevifotevikidatabaw09b2d.pdfIn PDF document text
    • https://cdn.sqhk.co/jalegewiguw/LigV2FH/puppet_pals_2_android_apk.pdfIn PDF document text
    • https://vojerured.weebly.com/uploads/1/3/3/9/133999986/pikubebopawowu_xajazufil_gevuwalepinavin_noroluwulukob.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/9jhiePd/killer_bean_unleashed_mod_apk_uptodown.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf0c2dfe-9588-43b3-b899-49dceeabc211/where_to_buy_cheap_printer_ink_cartridges.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/palugasamuzekafemisisuje.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/57152081634.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/cultural_nationalism_apush.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a1ffbbd-29dc-4f36-a5e9-db5b60816f31/kotabokanamabaf.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/cma_cgm_group_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f594d1c-0f86-448f-b6dd-7e6b2929c9c2/76077962187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0366e6-8c76-4033-9795-d824dbcfbf3f/nevufifelekabewedipasezof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4181272c-fe15-4874-b819-16702e8b7f8a/how_to_sell_training_programs.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_off0000d7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C5 5408 bytes
SHA-256: b90db2530baef7ab82189dd9ea568ee3296acb957033016816a76f03e26e0a53
font_01_sfnt_off0000ea48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA48 10796 bytes
SHA-256: 6f2853f0bc63d886db65d80cb6e17b20916d949be1a86430608d8af8281c42d1