Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5a01b144eb4596…

MALICIOUS

PDF

80.8 KB Created: 2021-03-16 01:27:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3a9747df3a9b9915bf9f1c0affcf62c8 SHA-1: f6e18ebcf90e0cded5a2a6ec17f2a319fb400493 SHA-256: 7b5a01b144eb45969d23b760f929be89f4eed46b3678f7fb831b9f2edb3db76b
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically identified as a lure for a whirlpool dishwasher troubleshooting manual. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links on disposable hosting suggests a link farm designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/strik?utm_term=whirlpool+dishwasher+troubleshooting+manual PDF link annotation
    • http://memimusisat.getenjoyment.net/new_york_bike_map_art.pdfIn PDF document text
    • http://timekitaparezu.iblogger.org/19531683721.pdfIn PDF document text
    • http://mizusugazalu.22web.org/the_secret_garden_1993_cast.pdfIn PDF document text
    • http://kedisuli.iblogger.org/72020985987.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/xofexasuwaneruzizuke.pdfIn PDF document text
    • http://outputqwvk.space/how_to_remove_descale_on_cuisinartxt6ez.pdfIn PDF document text
    • http://help-violation.com/zimigurikizevoredovusofei7pps.pdfIn PDF document text
    • http://xaredazisom.mywebcommunity.org/sony_str-dn1030_specifications.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bakenexiradofo.epizy.com/gogewibozuxopifamax.pdfIn PDF document text
    • http://lugumew.epizy.com/85260302742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72852e58-ce82-4293-9966-ce962872a87f/junutewofudinabomufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2cec9ab-ba34-42d9-8168-d705331123ea/wuwazenixifalagaromirawim.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/ford_mustang_gt_premium.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14f06d3-76bc-4010-8ea0-668d1b807671/48489300736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d836fe2d-7d56-435b-ab55-8edaf6c49dad/bosch_500_dryer_maintenance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ac8f896-2a28-4c3e-9e50-1eb4c1d2301f/kenmore_refrigerator_parts_ice_maker.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/wemidusojog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04280232-d3d8-4823-864d-997de11b564c/jazozofamofar.pdfIn PDF document text
    • http://wofenamokof.epizy.com/libro_desarrollo_humano_papalia_feldman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba61f80-eb71-4021-95bc-abfb9efe002c/75735806182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ce5a66-52bf-482a-949b-710308d3a3d6/2599577554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddfb9000-089e-40b4-8b2f-16c081776389/lekubiv.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_off0000fcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEF 5616 bytes
SHA-256: c1513597358aad303b34ca1c769e5b2ae18faf67e02b915ce0b907902efb146a
font_01_sfnt_off00010fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEE 10924 bytes
SHA-256: 4dac5abb3c4b000e82bacce40105865ad959f94349d5a0591f944daf00cd4b79

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