Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8144605c330ff0…

MALICIOUS

PDF

80.2 KB Created: 2021-02-26 13:38:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bac2aecd3eb7bd1584d2218411a954e6 SHA-1: 41204bb197c03da3639bca34509c1c322416d5a8 SHA-256: ce8144605c330ff0f0239ce8b46f127791bac150fff0e6b316982c1607dff125
126 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, and contains numerous external URIs pointing to link farms on disposable hosting. The document body, though heavily obfuscated, suggests a lure related to a camera manual. The presence of embedded URLs and the link farm heuristic indicate an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/wix?keyword=canon+powershot+sx400+is+manual+pdf PDF link annotation
    • http://ruguwafe.scienceontheweb.net/bose_cinemate_gs_series_ii_program_remote.pdfIn PDF document text
    • http://santecmb-sarl.com/fesomufuwataxewob0ngw5.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/permutation_and_combination_worksheet_with_answers_doc.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/bhagavad_gita_quotes_on_love_in_tamil.pdfIn PDF document text
    • http://jalatuxu.iblogger.org/fodezopebo.pdfIn PDF document text
    • http://excellent-spb.ru/86990364857p5fok.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/wixubabatoxijor.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/nazuxa.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/taranis_qx7_battery_18650.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/hoover_floormate_spinscrub_replacement_parts.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/37952154328.pdfIn PDF document text
    • http://rozepon.rf.gd/16930479298.pdfIn PDF document text
    • http://biborufa.epizy.com/university_of_washington_tacoma_equivalency_guide.pdfIn PDF document text
    • http://pivimufe.atwebpages.com/18773296469.pdfIn PDF document text
    • http://pesetunal.onlinewebshop.net/12th_computer_application_book_in_tamil_medium_download.pdfIn PDF document text
    • http://xoxozuzupa.rf.gd/capacitores_weg.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/87980148951.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/marketing_management_philip_kotler_and_kevin_lane_keller_15th_edition.pdfIn PDF document text
    • http://rivenoke.onlinewebshop.net/zedixaluxowi.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/juvogebo.pdfIn PDF document text
    • http://vatamutotomo.epizy.com/lufakupeserisoniminarug.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_off0000f283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF283 5576 bytes
SHA-256: d12d5ebfef7c243a31104ed1747fba8bdec94b1a70d5b189b96b0c6f0c87f5da
font_01_sfnt_off00010566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10566 14428 bytes
SHA-256: 4ab4c88f8fa8233391e8f5ad42ca521b8d21b858c72a524d95428caa94b8e530

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