Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6be194a063242b0…

MALICIOUS

PDF

79.1 KB Created: 2021-02-28 04:25:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4eb3a337bd5a1d93fcb0a2ddccf1f344 SHA-1: 29269a3e166ac516c7d8783bdfeed2f4fab42f56 SHA-256: c6be194a063242b0ce65ff05619ef29a1a95c1a8900a02527897f7792dac5c76
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. Heuristics indicate this is a phishing-related PDF, and the ML classifier strongly supports this assessment. The presence of external URIs and the link farm behavior suggest an attempt to direct users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/award?keyword=horse+diving+sport PDF link annotation
    • https://jasiximipiz.weebly.com/uploads/1/3/1/4/131453573/9d5da8f0c9.pdfIn PDF document text
    • http://help-service-support.com/37424931541v16v5.pdfIn PDF document text
    • http://gozaped.iblogger.org/ibm_java_7_for_linux.pdfIn PDF document text
    • http://vugijow.iblogger.org/who_caesarean_section_guidelines_2015.pdfIn PDF document text
    • https://zigamebujadosa.weebly.com/uploads/1/3/4/7/134745820/2166424.pdfIn PDF document text
    • https://mudulavodeg.weebly.com/uploads/1/3/1/0/131070753/c7403dc04.pdfIn PDF document text
    • http://naderuromopuru.22web.org/rojarexizedakado.pdfIn PDF document text
    • http://ceter.xyz/high_heels_platform_black_shoesuffgd.pdfIn PDF document text
    • http://itdiscounts.info/doturiwinos2yx2d.pdfIn PDF document text
    • http://nuverlites.online/darkness_and_flame_3_walkthrough_part_10frvob.pdfIn PDF document text
    • http://damvglaz0.xyz/29553172760xrol2.pdfIn PDF document text
    • https://jatufajikovuna.weebly.com/uploads/1/3/4/7/134719937/vikofe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://godemesefiw.epizy.com/tozebafonegunif.pdfIn PDF document text
    • http://teveniwavabubak.rf.gd/xuvijetopevisitogi.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/fogazerewolebitiluginexi.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/keystone_pipeline_oil_leak_in_north_dakota.pdfIn PDF document text
    • http://nejexapef.rf.gd/calendar_2020_word.pdfIn PDF document text
    • http://nivuzujanux.myartsonline.com/the_power_of_praying_woman_book.pdfIn PDF document text
    • http://gewumene.epizy.com/37277195617.pdfIn PDF document text
    • http://xesugowoxufe.epizy.com/blogspot_templates_for_business.pdfIn PDF document text
    • http://marakolin.epizy.com/monster_wow_cataclysm_launcher.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_off0000fbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAE 4908 bytes
SHA-256: db0deb60429e5d495b9d2a85001d5813eb2e2a3be00338cc72df55698aea2ba9
font_01_sfnt_off00010c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7A 10068 bytes
SHA-256: a25ec4e8efc1326a3c24429ea973fce1e2dda5608aaed94b0f2c9a98f0a060a3

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