Malicious PDF — malware analysis report

Static analysis result for SHA-256 9914e30214bbdaee…

MALICIOUS

PDF

84.3 KB Created: 2021-03-16 16:38:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02319f97b775d5d106e73f9e97399579 SHA-1: e5f95b6abca4581173033e14f12febc4dab6d57b SHA-256: 9914e30214bbdaee1fb9ed787955d31927fb04c47fef49cb1a91b02204461b28
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to other PDF documents, suggesting a link farm designed to manipulate search engine results. One of the primary URLs, 'https://pelibifir.ru/wix?keyword=toshiba+w614+vcr+manual', appears to be a lure for users searching for specific manuals. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/wix?keyword=toshiba+w614+vcr+manual
    • https://cdn.sqhk.co/jimevexir/gjgcuib/yandex_navigator_free_download.pdf
    • https://cdn.sqhk.co/sisadenev/WhhGwjc/gixematoxibazebimesomerax.pdf
    • http://modebedunizux.iblogger.org/vebukunalodoves.pdf
    • https://temabodanifow.weebly.com/uploads/1/3/1/4/131454916/nurip.pdf
    • https://cdn.sqhk.co/powurejur/rPBhd8a/shutter_island_warden_violence_speech.pdf
    • https://dufelawukada.weebly.com/uploads/1/3/2/6/132682042/9365293.pdf
    • https://malugula.weebly.com/uploads/1/3/2/6/132695531/3222148.pdf
    • https://cdn.sqhk.co/bimolixumotu/bgimuhj/grand_war_napoleon_warpath_strategy_games.pdf
    • http://famojefefe.iblogger.org/68166978289.pdf
    • https://pazerutafu.weebly.com/uploads/1/3/5/3/135392620/5843174.pdf
    • https://cdn.sqhk.co/dibitarebizu/hdWrRgc/math_worksheets_grade_7_algebra.pdf
    • https://cdn.sqhk.co/jiluputumusi/hqgeFgD/potusokupisugujupujafi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c96d0889-97fb-4213-90a4-a08ae01970e6.filesusr.com/ugd/ed32f2_1d3ccfb4f3f7479d9d3c94c2ced4165f.pdf?index=true
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_173649c20d3d4221bfdf8be42f13698f.pdf?index=true
    • http://januxalak.rf.gd/ledijoburujusafogibonubam.pdf
    • http://merijimiz.epizy.com/child_development_and_pedagogy_ncert_books.pdf
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_9284890c902d49af986f6583197804d2.pdf?index=true
    • http://webenawawejoped.rf.gd/comptine_d_un_autre_ete_sheet_music.pdf
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_0ca5908de4044f67b5a937ee4ccd101c.pdf?index=true
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_d665588bcba74e728b6d705509c6c4bc.pdf?index=true
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_18da35f9468443508eb2e2ef093c551c.pdf?index=true
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_516e9c55782e460a9e54a5d359ed0a7d.pdf?index=true
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_a81daaf8c7fc43619b6b85b3ec478815.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c64.bin
70ea6b550f9f388d2038bc5ed1254dc5cb910576ef9172f79c6e1b7a0ba5d711		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C64 5572 bytes
font_01_sfnt_off00011f51.bin
3324d4a408c09df124c70c95f0cc88b71e13adccf092cd07c1acaa40aeb49b85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F51 10824 bytes

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