Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a492bd765669144…

MALICIOUS

PDF

78.3 KB Created: 2021-04-12 19:40:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7f2847483a6ea44b35b159baca82ca5b SHA-1: 0e7936d5c345710b77394e2d487e746968444fad SHA-256: 6a492bd765669144be7e570290a101a9598f2dda21b45e6dda9a11dbf775b98c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a large number of external links, indicating a link farm or phishing attempt. The embedded content, though heavily obfuscated, suggests an attempt to redirect users to malicious 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 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://bologen.ru/strik?utm_term=how+much+is+stephen+king+worth+2020 PDF link annotation
    • https://cdn.sqhk.co/puvijupem/sjeDXjg/rc_heli_simulator_kostenlos.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/a9Uro5c/30758359122.pdfIn PDF document text
    • https://cdn.sqhk.co/gikiwifada/P2Rjfcw/61468382159.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/Eb6e1gi/telarik.pdfIn PDF document text
    • https://cdn.sqhk.co/mebinolopuf/5e2BhgJ/glory_ages_samurais_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_60319bdab52c8.pdfIn PDF document text
    • https://cdn.sqhk.co/penazavoxu/fZQoggN/gramfree._net_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/jdWhfis/wiponuvijobagigoraxaf.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/Njh6hd9/thrift_savings_plan_g_fund_returns.pdfIn PDF document text
    • https://cdn.sqhk.co/tititafoza/AnL4hfK/the_real_real_store_madison_ave.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403259/normal_5ff302a977926.pdfIn PDF document text
    • https://cdn.sqhk.co/lopijikuvi/ekzhfii/77768935454.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/bAdifKZ/xedalozoribuzefonopiwiti.pdfIn PDF document text
    • https://cdn.sqhk.co/kigowabalo/geidTvZ/mortal_kombat_xl_characters_not_showing_up.pdfIn PDF document text
    • https://cdn.sqhk.co/rorifugera/dmGidij/wallpapers_in_3840x2160_ultra_hd_4k_resolution.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489241/normal_5ff497a06abc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446645/normal_6068da3df13c9.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/dLjjfgi/shadow_fight_2_unblocked_games.pdfIn PDF document text
    • https://cdn.sqhk.co/fifapupifig/UPwqPK7/34687916111.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_bd4c0d6591164c999938371de84272d9.pdf?index=trueIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_efdf8d268ed44ba28e91aaf728c7bc8b.pdf?index=trueIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_753ad1cb46d647cf8c518e3059451602.pdf?index=trueIn 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_off0000f1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A3 5496 bytes
SHA-256: 389646bb9c1ac3c1c1c2768ecf4b7e59ed589c673f8f72f2a23ce1655102e10d
font_01_sfnt_off00010448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10448 11212 bytes
SHA-256: 1b9ec2b59e0445a4a0f2f7d690d112578a280eb33fa818018bd79fe78903d461

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