Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72b6b615065711f…

MALICIOUS

PDF

94.9 KB Created: 2021-02-22 15:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7970137cd1fdf364b584d2791f30a363 SHA-1: cd7abb07f2dcc02ede5e403563c7723f196bf5ff SHA-256: e72b6b615065711fecf179138a2e7723744c18747612c5ca0504cdce61b309f6
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable hosting services, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The embedded URLs and the nature of the link farm suggest an attempt to manipulate search engine results or lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=what+time+did+ram+dass+died PDF link annotation
    • https://titobabedax.weebly.com/uploads/1/3/4/3/134317276/lofanedegujedoz.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/famita.pdfIn PDF document text
    • https://mevuponepom.weebly.com/uploads/1/3/4/8/134899748/dubife_rixidamudajedam.pdfIn PDF document text
    • http://futevosug.22web.org/sitawomufozofiratik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404497/normal_6000703e8f2e4.pdfIn PDF document text
    • http://bezoxafeme.iblogger.org/papaberep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417531/normal_5ff27da1203c1.pdfIn PDF document text
    • https://rasegopejut.weebly.com/uploads/1/3/4/3/134317160/dakarikimexomit.pdfIn PDF document text
    • https://sugowixo.weebly.com/uploads/1/3/4/5/134588459/3949738.pdfIn PDF document text
    • https://vebuwume.weebly.com/uploads/1/3/5/3/135349689/6617568.pdfIn PDF document text
    • http://fiwamixos.iblogger.org/sumo_deadlift_form_athlean_x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366381/normal_600101f651469.pdfIn PDF document text
    • http://boxidodo.22web.org/where_does_the_miseducation_of_cameron_post_take_place.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505837/normal_60224014ed232.pdfIn PDF document text
    • https://guxumexowe.weebly.com/uploads/1/3/3/9/133999944/163618.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384817/normal_5ff4b2443cc05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dokebipozo.epizy.com/67472246605.pdfIn PDF document text
    • http://rupiroliwon.epizy.com/monopoly_cheaters_edition_rules.pdfIn PDF document text
    • http://zobovobewuw.epizy.com/agile_software.pdfIn PDF document text
    • http://zabazajalugawez.epizy.com/ff7_walkthrough_junon_underwater_reactor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001296b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296B 4620 bytes
SHA-256: 5c0d5ad3fa504fbae9a7f9436c9addb0b3c95160ccf40f63836e12a8cac57cbc
font_01_sfnt_off00013912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13912 11660 bytes
SHA-256: 5ef50b061355164dd014af1ee1152d715e952435a6db950861230e13390d0542
font_02_sfnt_off00015fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FE1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34