Malicious PDF — malware analysis report

Static analysis result for SHA-256 8205f004ad96a866…

MALICIOUS

PDF

93.8 KB Created: 2021-04-08 06:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 08be9a5f570f89b02857fd9c80172de2 SHA-1: f1401370d7f8b0cc8f1bcf6222fab1d67651a96b SHA-256: 8205f004ad96a866cc82664dc9e0d545979adb35f57443d4481429da065d2df4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://crophysi.ru/wix?keyword=angle+pairs+transversal+worksheet PDF link annotation
    • http://bixirif.22web.org/vaxubitukalototoralaxotak.pdfIn PDF document text
    • http://maewallace.com/the_scorch_trials_plot_summaryvu6mj.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/7464217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450876/normal_6040a263adb03.pdfIn PDF document text
    • http://hq-cleartv.info/how_to_bend_offsets_in_conduitk25m8.pdfIn PDF document text
    • http://helpverifybadges.com/freshwater_fishing_rigs_australiab02gz.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/john_the_ripper_brute_force_shadow_file.pdfIn PDF document text
    • http://tur8osale.site/349270267624nqbm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384817/normal_5fef85968151b.pdfIn PDF document text
    • https://zasiranel.weebly.com/uploads/1/3/4/5/134507270/7850879.pdfIn PDF document text
    • http://gamedv.design/anarchy_online_leveling_guiden7om4.pdfIn PDF document text
    • http://lapiwudoxavov.scienceontheweb.net/cataract_types.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_603213958ffde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471704/normal_6059bc2878e15.pdfIn PDF document text
    • http://astrohelp.space/66076296109ftwy4.pdfIn PDF document text
    • http://reduslim-italia.website/gixojekejiwevu8wuop.pdfIn PDF document text
    • http://natnat.fun/vans_old_skool_shoes_whitexgb3h.pdfIn PDF document text
    • http://forexgeeks.net/936016191856gp91.pdfIn PDF document text
    • https://waxifititisapo.weebly.com/uploads/1/3/4/3/134363739/3010929.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446502/normal_5fcdc0c8d938d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonarubitexo.atwebpages.com/joxamofabovuwogodewawejo.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/candidiasis_oral_bebes.pdfIn PDF document text
    • http://xojesulelu.rf.gd/10419221441.pdfIn PDF document text
    • http://fowakoleviwamop.onlinewebshop.net/dawasigewaj.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11830 5288 bytes
SHA-256: cfc80d44ea71ee0f8572bc3c1dd1ee674db11e5f1fce2c9c09951dc14f352f58
font_01_sfnt_off00012a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3E 11804 bytes
SHA-256: 0f6b1c189207966800aea962b1edd4464c1c0ebe6d711368436f57a19840c81b
font_02_sfnt_off000152be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152BE 16076 bytes
SHA-256: 2611bdaaaa47ae21ba74c972b5188a809c530078d300c06826c4bf90b59b805a