Malicious PDF — malware analysis report

Static analysis result for SHA-256 5918f6e3f0c13b54…

MALICIOUS

PDF

82.7 KB Created: 2021-03-11 12:46:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 4f1a71fe37e2acd9305e2e0f655e577a SHA-1: 860881c74d769e74934b25fb381d293a8dd95fc5 SHA-256: 5918f6e3f0c13b54901488900bf87301cd5eddc772b0dfd2c371c88df6d3a86e
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 high risk score. It contains an embedded URI pointing to 'vilenefex.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to an 'app control' application, aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/aws?utm_term=monster+smart+illuminessence+app+control PDF link annotation
    • http://pazadixokumox.sportsontheweb.net/xuputujowawasisifux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389793/normal_5ffd0a0ad7962.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382784/normal_5ff75b459ca92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451940/normal_603033d9974b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_600d18624aee7.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/a6Ljjji/diamond_crush_mirror.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_603a8b9319349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467277/normal_60290d2634a15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451930/normal_5fd13e406e39a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470553/normal_5ff15f3926aeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500440/normal_5ff800b50fbb3.pdfIn PDF document text
    • http://sozaxesugoj.mywebcommunity.org/59475243677.pdfIn PDF document text
    • http://puvinizozibejir.mygamesonline.org/play_school_drawing_book.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/33871209756.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/iTQLk0Y/fish_crush_2020_blast_match_3_adventures.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/vizegemawokaxe/98856018712.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/13513121121.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/39007271510.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/17243506089.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/worefejulumipazezi.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/13492577941.pdfIn PDF document text
    • http://medexode.atwebpages.com/camping_merit_badge_requirements_bsa.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/rugewere.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_off0001049d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049D 5084 bytes
SHA-256: 1532ef0b489f7f4086478c272c56e39d05a68e54940f01132683b5f38305aac3
font_01_sfnt_off000115d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D5 11712 bytes
SHA-256: 331b2bced8f6ade18ab6eee31a75b4e299f4b4ca78e616242e7969a069a699e1

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