Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8d76be750ec245…

MALICIOUS

PDF

77.5 KB Created: 2021-03-28 01:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2455ecacdaaf68529e1678eb0227065a SHA-1: b108c1f9c79d5ad4d757733d37bade2c104a9da2 SHA-256: 0f8d76be750ec24593df6eb392b3e8dd27bbf45b00580b6269af3da8ae3b6afc
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains and appear to be part of an SEO link farm. The document body, though heavily obfuscated, suggests a lure related to 'mental illness symptoms checklist pdf'. The presence of numerous links to potentially malicious or low-reputation domains indicates an attempt to redirect users to harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://maypoin.ru/award?keyword=mental+illness+symptoms+checklist+pdf PDF link annotation
    • http://doordash.fun/every_stage_of_human_evolution3xkt5.pdfIn PDF document text
    • https://linepapimufuto.weebly.com/uploads/1/3/1/6/131637640/tumokevideseru.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/jeep_cherokee_service_schedule_2014ik3xy.pdfIn PDF document text
    • https://xoxatujetila.weebly.com/uploads/1/3/0/7/130775098/d981b.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/ghfjahb/doomsday_escape_plan.pdfIn PDF document text
    • http://geleostone.online/18879332180hph3e.pdfIn PDF document text
    • http://skidki-day.site/zibasatapavadepinegatuiq8pz.pdfIn PDF document text
    • http://titoto.xyz/how_do_you_troubleshoot_home_thermostatpa508.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/kT6NYij/kingdom_connection_ministries.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451755/normal_6028651fba915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497075/normal_6056f1963c0a5.pdfIn PDF document text
    • https://cdn.sqhk.co/jegivoziba/iigiehj/wizasiwofuwobin.pdfIn PDF document text
    • http://top-odejda.com/african_coffin_dance_meme_originvnb8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_256cb74f2c314d7ab8fa719a623ba07c.pdf?index=trueIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_dd332ed378454828ae6e127690273488.pdf?index=trueIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_561dbb77cede47ea9700b68894726ef5.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_off0000f1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D5 5468 bytes
SHA-256: 671fbf590b41a7a7e09c6d8bee522398b54bddee2a2e510bb196283836036bc1
font_01_sfnt_off00010462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10462 11084 bytes
SHA-256: 582bd42a14c2615cd6830f5e620e9b71f3f9eb0797e764847fdaa5b4739c4fdf

Open this report in the interactive analyzer, or submit your own file for analysis.