Malicious PDF — malware analysis report

Static analysis result for SHA-256 9248197de9fb4257…

MALICIOUS

PDF

95.2 KB Created: 2021-02-22 04:43:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4302c3ca50e96387a6e26dca3d58eafb SHA-1: c4f90ce17089f2b8812e8320458e71560f003619 SHA-256: 9248197de9fb425752acc2133e470ffb83ab22fa224e6d9ada4dab933c2d9e3e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://seumenha.ru/123?utm_term=what+is+traditional+music+in+the+philippines PDF link annotation
    • https://fiwinibikevuli.weebly.com/uploads/1/3/5/3/135339450/kefijud-muxix-bugiropulemag.pdfIn PDF document text
    • https://xugugizebe.weebly.com/uploads/1/3/1/4/131482894/ad50bae6e.pdfIn PDF document text
    • https://widadujas.weebly.com/uploads/1/3/1/1/131163760/durarife.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/A6hcjhM/xafumokijufudenupofusi.pdfIn PDF document text
    • https://poxofosu.weebly.com/uploads/1/3/4/3/134308827/susegatubaw.pdfIn PDF document text
    • https://xizadububexo.weebly.com/uploads/1/3/4/5/134595199/7435359.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/fgenvha/dipaputubujonosogorepamag.pdfIn PDF document text
    • http://my-favshope.online/pms_to_cmyk_conversion_chartm6hhb.pdfIn PDF document text
    • https://rigoxetevub.weebly.com/uploads/1/3/4/0/134017132/2785375.pdfIn PDF document text
    • https://xojowikenokux.weebly.com/uploads/1/3/4/7/134706662/767073dccf.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuzadisup/9ifYjbn/23026346235.pdfIn PDF document text
    • http://bigops.fun/575215721536jj6.pdfIn PDF document text
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/binabuxedexugiloke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://meduzifovum.epizy.com/uc_browser_free_internet_apk.pdfIn PDF document text
    • http://momerulazem.rf.gd/bullet_basya_movie_song.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_off00012b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B99 5324 bytes
SHA-256: d4b227a70fc956e81c29095df323648c0a17aa054faba406bf44a7f50f8bcde9
font_01_sfnt_off00013d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D93 14096 bytes
SHA-256: db71b6aa598998966969ca5c61c67e4b0b2ae79abee0a813ad5a8da0022499c4

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