Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddff0be5729600d6…

MALICIOUS

PDF

74.1 KB Created: 2021-03-02 04:41:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7e4755124943f3ee44e6bdc3a1d936e SHA-1: 02c2a29e4efbade9bc27ca5750cd0aeb79440d67 SHA-256: ddff0be5729600d60174051161996db5af2f3459d17a9d86d5c00b9bf01b2176
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating phishing and trojan characteristics. An external URI pointing to 'jacksth.ru' was extracted, suggesting a phishing lure related to 'mysterious cave map locations'. While no scripts were explicitly extracted, the PDF structure and embedded URI indicate 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 0.9998

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/wix?keyword=mysterious+cave+map+locations
    • https://pebabole.weebly.com/uploads/1/3/4/6/134698512/3620699.pdf
    • https://static.s123-cdn-static.com/uploads/4453901/normal_5fc89b2f1d20d.pdf
    • https://cdn.sqhk.co/molodomo/gehRGzb/mule_on_android_servers.pdf
    • http://lazujifoxupa.getenjoyment.net/paragraph_structure_worksheets.pdf
    • http://hisgohar.site/masosulapemijokupebc7lh.pdf
    • https://bosamekuxukis.weebly.com/uploads/1/3/4/6/134672370/a8aa68854.pdf
    • https://lufosafol.weebly.com/uploads/1/3/0/7/130775677/4284431.pdf
    • http://justiciaforjustice.com/diabetes_care_ada_guidelines_2018r7ipt.pdf
    • http://kojazunupetip.mygamesonline.org/is_pioneer_a_good_ac_brand.pdf
    • https://cdn.sqhk.co/letinumi/Mhfciih/makekene.pdf
    • https://cdn.sqhk.co/mafokesaxuvi/w9Cihjc/streets_of_rage_street_fighter_edition.pdf
    • https://dubobovutorikug.weebly.com/uploads/1/3/5/3/135332124/7251059.pdf
    • http://vetebozo.mypressonline.com/71221627492.pdf
    • https://cdn.sqhk.co/jisokemefaz/eihXicr/zelabudezavarukogerodiw.pdf
    • https://cdn.sqhk.co/lajawawinu/fJiddK8/canadian_license_plate_game_printable.pdf
    • https://static.s123-cdn-static.com/uploads/4412159/normal_5ff480c04d28e.pdf
    • https://cdn-cms.f-static.net/uploads/4426810/normal_603c0162aafa6.pdf
    • http://pazujiz.mygamesonline.org/what_does_sexually_frustrated_mean_for_a_guy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://japamitafixe.myartsonline.com/dumujibowarumeriro.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_off0000e439.bin
0540f26bbbc82f7ac66d7676da970733b9eaf1fcfe1bd4560cb057acec00aec9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE439 5244 bytes
font_01_sfnt_off0000f613.bin
80315d3552247d267b0737f3ff1fa8c8acdd6f73d880c88aa227f599a1f4e4d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF613 10952 bytes