Malicious PDF — malware analysis report

Static analysis result for SHA-256 68589c4c04ce3cbf…

MALICIOUS

PDF

70.8 KB Created: 2021-02-18 01:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9f25cb985dfef07e002b35f3d62f354f SHA-1: 78cba6d199a31d4a4e8a96fd08b189837b97160c SHA-256: 68589c4c04ce3cbfa58665df1b35725492e9536375ed06f389f46fb26d87af35
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. The embedded URL 'https://jacksth.ru/strik?utm_term=demeter+and+persephone+myth' suggests a lure related to mythology to entice users to click.

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 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://jacksth.ru/strik?utm_term=demeter+and+persephone+myth PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379363/normal_60261b9f82e28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425483/normal_5fc71821c2e51.pdfIn PDF document text
    • http://zelopaqq.xyz/74842569803uy3ju.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/Miheoah/wafanafawawagosozizasido.pdfIn PDF document text
    • http://qlemelest.online/pumibakipakuzanasupazose3nznw.pdfIn PDF document text
    • http://classicalnaturally.com/10113316435td1ip.pdfIn PDF document text
    • http://aslixan.com/printable_1st_grade_reading_worksheetst5t1y.pdfIn PDF document text
    • https://cdn.sqhk.co/xiteduva/9hjgcB5/alchemy_shattered_pixel_dungeon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403421/normal_5fd27f297ffb8.pdfIn PDF document text
    • http://avtovishki-msk.ru/mesabuzirerijivmnxln.pdfIn PDF document text
    • http://rankingcoach-seo.com/plato_apology_and_critoveg2o.pdfIn PDF document text
    • https://cdn.sqhk.co/zisenusaf/f5jiijb/product_management_definition_in_marketing.pdfIn PDF document text
    • http://naykaryadom.fun/595598380693m70c.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/GgibgcX/meme_sound_effects_download_pack.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/xisakazelelinim/55156485320.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/hallelujah_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/farigekuru.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/feedback_on_your_reporting_manager.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_off0000db2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2A 5268 bytes
SHA-256: a78129fdec11fcd92961886f466e6d0b80b60dc964de0743374758626c7d2275
font_01_sfnt_off0000ecf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF3 9756 bytes
SHA-256: b1f9dffb8ddd238e3d8fe59c930c8759e99b4cbf55c03c1f11e3ff4f6bbacc25

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