Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c22e32bd1be2741…

MALICIOUS

PDF

71.5 KB Created: 2021-01-28 00:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0635e295d46dbed73f2f1a8dd9d050a9 SHA-1: 42787eb20ba4e069f96b17515e2159d9dda86aac SHA-256: 2c22e32bd1be2741b663e7a6a59baf272ef3e4432f3bc92d23da528ab61a9ea0
126 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 high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to host a large number of links pointing to potentially malicious or disposable domains, likely for phishing or distributing further malware. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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 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://jottigo.ru/wb?keyword=tank%20block%20blast%20mod%20android%201 PDF link annotation
    • http://dronextactical.xyz/mundos_en_colision_immanuel_velikovsky9rvs5.pdfIn PDF document text
    • http://fionainthefield.org/dreamscapes_nightmare_s_heir_safe_code8kkj9.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/604663588128w3wg.pdfIn PDF document text
    • http://tenakotete.22web.org/framed_ink_marcos_mateu.pdfIn PDF document text
    • http://remont-kholodilnikov.website/hide_and_seek_download_pc8x37t.pdfIn PDF document text
    • http://cadenalia.com/kitchen_cabinets_plansrvdf0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415322/normal_5fc9a83a0fab8.pdfIn PDF document text
    • https://cdn.sqhk.co/topazawu/egjgigh/xobar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369323/normal_5ffcf75722c83.pdfIn PDF document text
    • http://reassurez-moi-fr.info/kasogudildju54.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pezedavepajizum.rf.gd/22553095445.pdfIn PDF document text
    • http://xapimiwosusuv.epizy.com/vugekuvibipajerafoz.pdfIn PDF document text
    • http://rusozetowozo.epizy.com/muwadonowal.pdfIn PDF document text
    • http://nepezuse.rf.gd/analyst_s_style_manual.pdfIn PDF document text
    • http://wemosoxa.rf.gd/suweremusuwa.pdfIn PDF document text
    • http://ledukuxadom.epizy.com/bling_bling_ikon_free.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_off0000d9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C0 5292 bytes
SHA-256: 0b91f4128506dfe99252146a76ef131947f8e13df9a857c2e5cff94a264186cb
font_01_sfnt_off0000ebaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAA 11000 bytes
SHA-256: f458b262b115e2f3087275353a5b7972878bb85c4923720395974e93d5957b99

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