Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba8920117d0ead1…

MALICIOUS

PDF

126.6 KB Created: 2021-03-12 04:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2c16d4fe2808b986daefeaefb5ee9bec SHA-1: 097e69e55f43bfeaa494ef1b7406ca1b3da28cf7 SHA-256: 7ba8920117d0ead1e3d91337e18113f11230b56582156359078624bb612df94a
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or SEO manipulation scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=ninth+crusade+hellsing PDF link annotation
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/9660942.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/buwemobekezedox_dulevirowif_naganezu.pdfIn PDF document text
    • http://ruwazumusef.scienceontheweb.net/19660124681.pdfIn PDF document text
    • http://ribavid.medianewsonline.com/sketchup_2017_3d_models_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/jjiqjeg/pudago.pdfIn PDF document text
    • https://webuxeneme.weebly.com/uploads/1/3/4/3/134368634/xifovedanexo.pdfIn PDF document text
    • https://xoxomupufolud.weebly.com/uploads/1/3/0/9/130969418/62d74c7447f.pdfIn PDF document text
    • https://cdn.sqhk.co/zojisixu/hfIjevf/jodixikivesuxorabax.pdfIn PDF document text
    • https://voxonororipesap.weebly.com/uploads/1/3/5/3/135383222/8247597.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sulorowanutabu.atwebpages.com/how_to_make_turpentine_oil_at_home.pdfIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/vba_programming_language_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/que_son_los_anticoagulantes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da96acf5-a9c7-4c79-b21f-5173d3a4e81a/besikudeferanikefo.pdfIn PDF document text
    • http://fixidil.atwebpages.com/apa_6th_edition_reference_format.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/69681256670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0805d498-2cf7-4d4d-bca3-5d2baabeb5c6/the_knife_of_never_letting_go.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14270 29880 bytes
SHA-256: 571d6103b6bc6650fab86b9fae273e31b575caae9045306f0833eca7da93e1d7
font_01_sfnt_off00019fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FE2 5172 bytes
SHA-256: fd4210d7686420a03977583cf0e8fc38e0e642d3739dcfb0c99e8d17faafbfb5
font_02_sfnt_off0001b175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B175 11144 bytes
SHA-256: 340bfccf7f2b7fb31bf65b3e6e46291eea0ecdcf7755f9cd773153319087e2ab
font_03_sfnt_off0001d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7A2 16168 bytes
SHA-256: 8c1e3298cb301b6aa2c2aeff0a89e1cafee6626e56d5ffa98ad52a7598c40df9

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