Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a62ba23be54046…

MALICIOUS

PDF

86.6 KB Created: 2021-09-02 14:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b641a0c902a3a27066d476227b0afe93 SHA-1: 9a6051aa37c24b5a1bc1a3f8b050413801c443df SHA-256: c2a62ba23be540467f0984b7d769b8ef0ff9949554045b4ffc6c24693a28b2d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on potentially disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://parkhigh65.com/clients/4970/File/kivawezaxujexanofesitu.pdf In PDF document text
    • http://ototavandosemesi.com/resimler/file/befukom.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/buwes.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/76130131616.pdfIn PDF document text
    • http://ckpak.com/fckeditor/userfiles/file/96638510568.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3092d386d---malodebugosuzeralin.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/dupovotaxobazusi.pdfIn PDF document text
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/36156203792.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/18216817610.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/lonolamu.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16107c4c1bd5df---14446591262.pdfIn PDF document text
    • http://toitureetfacade.fr/data/Files/33421864177.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/jawukezalaji.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/58223886218.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/jagej.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b8d169d82---36838838452.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/jizemasogop.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/70211416478.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/24748911817.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/zogejunusifatuwurefujo.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/958911dda97c80c1bd68ab4ff5e0f536/70976069059.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff5ef8720e---tapugutiwesuxusuxopoler.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/207d4ad043739a56bc900977d851feec/68776336165.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/bukonujitiparakusepito.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=canon+eos+70d+camera+instruction+manualPDF link annotation
    • 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://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_off0000eb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB78 10836 bytes
SHA-256: c70375ac6e08586be28b57c60e1bbb6629db2edc488dd45c0bc9d04ef0f211e5
font_01_sfnt_off00010481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10481 18256 bytes
SHA-256: 70fd2f042e21dc1135faf333721122e85afd07a018f9b776d85421c0248dec89
font_02_sfnt_off00013457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13457 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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