Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c896c6c02adb6bb…

MALICIOUS

PDF

82.8 KB Created: 2021-01-15 06:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9c80f40be62f7ce0cebdcef8da0799df SHA-1: 68cb6de87905b62d6ec9db5483e669491ddb008d SHA-256: 8c896c6c02adb6bb1a35096e53fc2b4d88dd3e6646686d12a875b49889ac5195
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a redirector to malicious infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://ggtraff.ru/aws?utm_term=fidic+1999+red+book+guide+pdf In PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/d2bf5.pdfIn PDF document text
    • https://cdn.sqhk.co/buweworipoza/phdhb21/buliwuzibije.pdfIn PDF document text
    • https://xadinizojagum.weebly.com/uploads/1/3/4/0/134016813/kokifuk.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/jobavo/85132052844.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/91728105824.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/537889102.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/ratugerimiduwilem.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/automation_production_system.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/24752343433.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/battlefield_4_weapons_locations_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/23026322094.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/sample_church_membership_transfer_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/graphic_card_for_dell_laptop.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_off000107d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D1 5272 bytes
SHA-256: e438d784800e6179c721ac37dd58eac470b87050755402984063bc6e73ea4e98
font_01_sfnt_off000119d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D6 10708 bytes
SHA-256: 5df9bb8ecdfca8951e0c765bc369bf96077cb551cdabc35d6be45cd21d3e02d1

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