Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5f3ea7aea46feb…

MALICIOUS

PDF

114.5 KB Created: 2021-03-03 22:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 95720dd7d5105f97403083445cff83f6 SHA-1: bc8abee316a782819cb9191b7225dadd1c19226a SHA-256: 7b5f3ea7aea46febc81b259f87ed883bb63ff62a1db33b9643fa3ad05f37e248
156 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 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 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.
  • 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://dugedepap.ru/strik?utm_term=where+is+prince+caspian+filmed PDF link annotation
    • http://gexomafe.mypressonline.com/shop_vac_replacement_parts_lowes.pdfIn PDF document text
    • http://boxijogirexu.medianewsonline.com/25732866349.pdfIn PDF document text
    • http://zvezdasevera.online/super_sniper_rifle_terraria_mod12640.pdfIn PDF document text
    • http://itanah.space/90747844145q4smq.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/kavesujebezuduwubex.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/bihzHhe/tipobelejezukoxekalogawi.pdfIn PDF document text
    • https://daxeteven.weebly.com/uploads/1/3/2/8/132814811/renidefepuru.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/bifadiwuwileji/c_template_parameter_pack.pdfIn PDF document text
    • http://kutoxinupuroxo.onlinewebshop.net/ge_proficy_machine_edition_9.5_programming_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/betternet_pro_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/24512131013.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/bobotofilume.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/nazomulekunavuwekew.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/monocle_madrid_city_guide.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_off00018474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18474 5408 bytes
SHA-256: 69bb919e137bf9c5d8541257f1034f953e5e905efd40aa59757b128915459c2c
font_01_sfnt_off000196bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196BB 11300 bytes
SHA-256: 7455dd41b879552d21f5aa41c4a1dba3bf4f6979bdddac746e69a618b7dda9f4

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