Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d46aa146a7818c…

MALICIOUS

PDF

74.4 KB Created: 2021-01-19 12:50:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d9a432c29e2f4e80d94ccd2b16210621 SHA-1: c6b06b5fb1529575e6c55e533ff69d73f9e30543 SHA-256: 12d46aa146a7818c923b7167f0ac8648c5c873c85af892afcbcbe06f11441716
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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/wb?keyword=readymade%20mba%20projects%20free%20download In PDF document text
    • https://cdn.sqhk.co/lofakekaf/rifXgdH/servicenow_incident_soap_api.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/gdmMBCH/95667865707.pdfIn PDF document text
    • https://duzetokip.weebly.com/uploads/1/3/4/4/134404829/7621902.pdfIn PDF document text
    • https://cdn.sqhk.co/fogobewataja/hhaoPji/link_the_9_dots_with_4_straight_lines.pdfIn PDF document text
    • https://fifikasato.weebly.com/uploads/1/3/1/4/131437502/widawuge.pdfIn PDF document text
    • https://popuverixi.weebly.com/uploads/1/3/1/4/131438274/modale.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/jpRijwG/witilamabikagemipalezatu.pdfIn PDF document text
    • https://budaxopam.weebly.com/uploads/1/3/4/7/134711784/5704104.pdfIn PDF document text
    • https://vibomasovig.weebly.com/uploads/1/3/1/0/131070198/6989482.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/ig4LhlM/exogenous_vs_endogenous_variables.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/Stvoyhf/teaching_english_grammar_vk.pdfIn PDF document text
    • https://logutidukikov.weebly.com/uploads/1/3/1/3/131380383/duvudur.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/jIifB3u/gubanojarosivuvabod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bunakakivukutus.epizy.com/converse_one_star_platform_ox_black.pdfIn PDF document text
    • http://jolatuziguxobe.rf.gd/eicher_motors_balance_sheet.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_off0000e51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51B 5716 bytes
SHA-256: df9cdb498718c32a99ddad76b5b3d6c99f86f510bf61574ac74f78f920bdfe5a
font_01_sfnt_off0000f897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF897 10516 bytes
SHA-256: 5288e1e09aac69ccf2d0812cafe50bd8a0da79fb0f4b880f9feb12d72772197c

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