Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c972075382392cf…

MALICIOUS

PDF

75.9 KB Created: 2021-02-15 10:56:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: fe7d5c1a381f4d78e773eb9182d43b6c SHA-1: a334acba2ad3d46f4157f6ea3ad91240f387af37 SHA-256: 0c972075382392cfda0421566d842ce76c995054a0f39c27e6bb59d2e479863b
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains text related to coin valuation and references wkhtmltopdf, suggesting a lure. The presence of numerous external URLs, particularly 'https://jacksth.ru/wix?keyword=how+much+is+a+denarius+coin+worth', indicates an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=how+much+is+a+denarius+coin+worth PDF link annotation
    • https://cdn.sqhk.co/ravuviwidi/gDtOheR/wild_blood_2008_full_movie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443342/normal_5fef4700514ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450630/normal_602205ff3083a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380413/normal_5ff9890a5b58a.pdfIn PDF document text
    • https://cdn.sqhk.co/gobenebovi/ggjhbAo/green_bay_weather_monthly.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450037/normal_5fc572e8d483a.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/msjb4U2/stone_and_wood_camo_skin_minecraft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_6020d87e06c49.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/fATUmni/power_hover_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/cuNwjfE/zenewafisijorug.pdfIn PDF document text
    • http://gafaneripebenu.iblogger.org/siruthai_puli_tamil_movie_hd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426941/normal_60135e8c23202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_601d615517fe9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sirulumen.rf.gd/dikabote.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/english_to_spanish_translation_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/acr_guidelines_for_screening_mammograms.pdfIn PDF document text
    • http://werawizanobekiz.rf.gd/63997622655.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/judutumuxuxobizasogul.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/boostspeed_10_free.pdfIn PDF document text
    • http://medipebep.rf.gd/commando_2_song_djyoungster.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_off0000ec10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC10 5200 bytes
SHA-256: 3b82997279811637950b082de83ec20fa87abd906837e66d36029fe21b171c9b
font_01_sfnt_off0000fda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA2 10872 bytes
SHA-256: 97faeb0a94ac68a826c994fb743b31825b80195ec83ff9c46ad2d5da88ff02eb

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