Malicious PDF — malware analysis report

Static analysis result for SHA-256 0598973bf54a99c5…

MALICIOUS

PDF

118.8 KB Created: 2021-03-15 07:00:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 35f1e8fcc1485880f3762cf0e0d0dc62 SHA-1: 69df774b4ff4f90ba1912a7521c18c00f9a5a235 SHA-256: 0598973bf54a99c51fea4dc6e89cd011ebcaba64dd106cf5f01c5c2c057a63d3
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to potentially malicious sites, possibly for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=japan+sword+fighting+style PDF link annotation
    • https://sazekunoteti.weebly.com/uploads/1/3/2/7/132740187/2fe3a98570f3b.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/iarmghj/pegoxusafese.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/popotoj.pdfIn PDF document text
    • https://cdn.sqhk.co/rizikodeni/gZMlrJX/rekutaganezi.pdfIn PDF document text
    • http://pinopizo.sportsontheweb.net/early_civilizations_ancient_egypt_in_context.pdfIn PDF document text
    • https://cdn.sqhk.co/tarudifirew/UCgcJ8h/gamecube_smash_bros_melee_trophies.pdfIn PDF document text
    • https://cdn.sqhk.co/faroziwe/euRiigj/80936034670.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/iiSbmjb/vivi_bubble_tea_menu_flushing.pdfIn PDF document text
    • https://kofudavobew.weebly.com/uploads/1/3/4/6/134602163/c9420a7b76fc4.pdfIn PDF document text
    • https://lubikumak.weebly.com/uploads/1/3/1/4/131453733/4881447.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/Dmjbhhx/26127505347.pdfIn PDF document text
    • https://cdn.sqhk.co/rebamomidaw/dhchgjM/pathogenicity_islands_are_typically_associated_with.pdfIn PDF document text
    • https://zebazowis.weebly.com/uploads/1/3/4/3/134310266/rovotivifebu-porudunelur-zawiku.pdfIn PDF document text
    • https://cdn.sqhk.co/vexavudakepa/ghhh3T3/vomebeniwezonizumumog.pdfIn PDF document text
    • https://waronovubuwige.weebly.com/uploads/1/3/4/6/134631102/ff24d.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/9dijhf5/life_gallery_hotel_swimming_pool.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/wegugus/dead_silence_movie_dubbed_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/78501004962.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/mofefukawupoj.pdfIn PDF document text
    • http://dogiwexor.myartsonline.com/are_black_shark_teeth_rare.pdfIn PDF document text
    • http://ligujizulogi.atwebpages.com/20473579954.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/toyota_production_system_training.pdfIn PDF document text
    • http://rolubumemetujin.atwebpages.com/retulekixube.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/bt_business_smart_hub_6_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/burodajamiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/xotazagomusorut.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/37874581652.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A3 47152 bytes
SHA-256: ebba93416ec5a4c19795020c05d40a54d4ba6e35bad664051e9128cb1c15ba24
font_01_sfnt_off0001955a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1955A 5484 bytes
SHA-256: dbda888a8881b3aae7c3d5236f31ef156a2ae46b0ed8e644e8a623918ae11dea
font_02_sfnt_off0001a818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A818 10932 bytes
SHA-256: 46fc4e49f254c0a4ce1918319cee53945c7bbedb69745fa58fe62accde685b38

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