Malicious PDF — malware analysis report

Static analysis result for SHA-256 6649ad572e520d44…

MALICIOUS

PDF

78.0 KB Created: 2021-04-07 20:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c15ade9f7050cdaa4bd81d61c93dd0cf SHA-1: 733c5c0e5b8721beea60fff0911feb058c2ac45c SHA-256: 6649ad572e520d440f67769670042a0073c7dbc98e9f0fb4098bb749879e9fca
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=what+is+the+best+workout+program+to+build+muscle PDF link annotation
    • http://rijunoje.mygamesonline.org/bible_study_guide_2020.pdfIn PDF document text
    • http://lukufogud.getenjoyment.net/voxiposeli.pdfIn PDF document text
    • http://laxana.ru/batla_house_full_movie_by_filmywap._com6pu37.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/3252985111.pdfIn PDF document text
    • http://businesshelpservice.com/81691880861nhif4.pdfIn PDF document text
    • http://tanemazijafawin.medianewsonline.com/lonowulito.pdfIn PDF document text
    • http://reduslim-officialsite.site/the_hobbit_book_sizemodvs.pdfIn PDF document text
    • http://loneresel.mygamesonline.org/75024782566.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/18167168515.pdfIn PDF document text
    • http://bumefivaloso.scienceontheweb.net/deep_ecology_and_world_religions.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/how_to_calculate_inflation_adjusted_return_in_excel.pdfIn PDF document text
    • http://reweder.site/1982910295bd6rq.pdfIn PDF document text
    • http://complect-tech.ru/44870752488xqvez.pdfIn PDF document text
    • http://saporik.scienceontheweb.net/11602062638.pdfIn PDF document text
    • http://keto-menu.online/xevowedositimifunutenen4wrvj.pdfIn PDF document text
    • http://mrshadow.net/70250022882ehket.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixomirorubu.myartsonline.com/devaxus.pdfIn PDF document text
    • http://torejejowomu.myartsonline.com/gaxitazajagewalet.pdfIn PDF document text
    • http://girofili.myartsonline.com/how_to_get_merit_badges_fast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786ddf7a-2294-491f-9069-5d8a5b3a14b9/najenevomagaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c69f5bf9-4c2e-4556-822e-fb9ffedfb742/describe_how_environmental_changes_affect_plants_and_animals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc3d5d5-a328-4e42-bd7a-d31b1a5dbef4/adobe_photoshop_cs4_tutorials_photo_effects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03a064db-5ff6-42b4-bd09-f8c654a20a07/cfop_f2l_algorithms.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_off0000f3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B9 5796 bytes
SHA-256: 7a9a94e19dde1c3a855ae92b685d96cfc3ec6f4dd0a76b1d1f288fe80d1bc03b
font_01_sfnt_off0001075e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075E 10492 bytes
SHA-256: 2b3549aecafd01d7335ffad7662cd618d107aa7568288cf8090800862d86fc02

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