Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae836fb7229913dc…

MALICIOUS

PDF

85.2 KB Created: 2021-03-21 03:09:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7eb566d4ad68eabf46067cc166a78be0 SHA-1: da056f45019d396356d59fa698fff40b1365abf2 SHA-256: ae836fb7229913dce74227796fafcf56eb8e1266a79144b24971c3b8f805b76a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. The heuristic PDF_SEO_LINK_FARM indicates the PDF contains a large number of external links, with the primary suspicious URL being https://soxebez.ru/award?keyword=belt+bucket+elevator+pdf. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of numerous external links suggests it is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://soxebez.ru/award?keyword=belt+bucket+elevator+pdf PDF link annotation
    • https://nakalefa.weebly.com/uploads/1/3/4/5/134522788/kapelafimif.pdfIn PDF document text
    • https://xinogibujijinak.weebly.com/uploads/1/3/4/2/134235465/panatidiva_jibowuzetawa_zigubikoton_jagegupaxolanu.pdfIn PDF document text
    • https://jelebemurufipo.weebly.com/uploads/1/3/4/4/134442628/vepok-lepuxasuxon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_dcd05c49a9ee4cb9ad144dde19628a65.pdf?index=trueIn PDF document text
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_9a312aee3ccf4fa3ab8e65309f8d12f4.pdf?index=trueIn PDF document text
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_787f12a5fd1b48b2b70952096aa3abaa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mulerux/wd_tv_live_streaming_media_player_manual_espaol.pdfIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_43ba31cdb662429dbd4c440274a39660.pdf?index=trueIn PDF document text
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_3e483dec05924f778a515785a14382be.pdf?index=trueIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_d1251d1191134978b4e6ca42e9953701.pdf?index=trueIn PDF document text
    • https://cb5a1bef-7d05-4463-9361-9dceb4a497f4.filesusr.com/ugd/b13fd1_251241a9d73646c89da6c27840702d4f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/73102306326.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/69742743697.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/accident_report_lafayette_la.pdfIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_b42df292751045e68af8ba17d31e135a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/79917337123.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/21517270488.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/2013_subaru_impreza_wrx_horsepower.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_off0000f95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95A 5284 bytes
SHA-256: fd6118e2d4ef0b61cce7801b36dbfd698f21ae44ea690079a28ec961508ddd10
font_01_sfnt_off00010b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6C 11364 bytes
SHA-256: b8d9e9db96b4f845df5307a894623aff81124620c48ee6bc0635526518a46a00
font_02_sfnt_off00013233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13233 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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