Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a2671524663ec3…

MALICIOUS

PDF

82.9 KB Created: 2021-05-03 13:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9709df5c4f6015a2323573ee6ce50c8 SHA-1: 7e9b2bc6c91d8a80ecfed2deafe2cb5c8e3e885d SHA-256: 25a2671524663ec391825be6e4c0a960319111f630f6436e2afdf1811a4abb89
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'The dark tower the gunslinger chapter summary'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=the+dark+tower+the+gunslinger+chapter+summary
    • https://cdn-cms.f-static.net/uploads/4419206/normal_602da0cf4260e.pdf
    • https://cdn-cms.f-static.net/uploads/4406168/normal_606ac196b95a6.pdf
    • https://static.s123-cdn-static.com/uploads/4376598/normal_5fe4cb0e1336a.pdf
    • https://cdn.sqhk.co/kadeposamo/13jf5jg/74621955825.pdf
    • https://cdn.sqhk.co/vupapevixu/Kjiicgh/this_is_the_police_2_nintendo_switch_gameplay.pdf
    • https://cdn.sqhk.co/zosiwikiw/jhhal1R/falling_sphere_viscometer.pdf
    • https://cdn-cms.f-static.net/uploads/4414500/normal_6062d19a5bb43.pdf
    • https://cdn-cms.f-static.net/uploads/4392237/normal_601f6acfc9ea9.pdf
    • https://cdn.sqhk.co/nalomuxe/gf7Bjnj/bapizedifiburowigoragem.pdf
    • https://cdn-cms.f-static.net/uploads/4379035/normal_605e0a4a41fba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/91d32c5e-5430-447c-b678-4895536e1d99/10172373097.pdf
    • https://s3.amazonaws.com/jenisozazewubo/88434880593.pdf
    • https://s3.amazonaws.com/zuxime/kikokomab.pdf
    • https://uploads.strikinglycdn.com/files/e464a673-07ec-443a-a59a-3016b8fa3f88/muraroxakidufasa.pdf
    • https://s3.amazonaws.com/memobofilenabon/zujavexiseti.pdf
    • https://s3.amazonaws.com/zesixefe/he_s_a_tramp_piano_sheet_music.pdf
    • https://s3.amazonaws.com/pusori/25391846455.pdf
    • https://s3.amazonaws.com/mojivikapeti/platform_shoes_white_cheap.pdf
    • https://s3.amazonaws.com/juzinaramip/snow_informer_song_lyrics.pdf
    • https://s3.amazonaws.com/supefujoxopubu/rafimaxiguxazex.pdf
    • https://uploads.strikinglycdn.com/files/068a693c-7967-43ee-8bdd-126de404cdbb/why_wont_the_sound_work_on_my_samsung_tv.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102e2.bin
fbdfc1da85e34c44155dcac2733dddffae21b3ff438e632478f4b404715e94f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x102E2 5692 bytes
font_01_sfnt_off0001162d.bin
a378e2040cea06daf9618c7720bc82fa06aac05ef9db088fcae126c8ceb04c89
pdf-font-stream PDF embedded font (sfnt) at offset 0x1162D 12152 bytes