Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb9eba94a1dfc4b…

MALICIOUS

PDF

65.4 KB Created: 2021-01-14 00:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 8f0720ed517afca2b0618a21bce6977b SHA-1: 190de87eb3871fb881169a385593813f85ba110c SHA-256: bfb9eba94a1dfc4bf35775bc65f0c65a661dc32ae34329056a1d9db36b92534f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into downloading a malicious payload. The document body, though heavily obfuscated, contains references to 'test dpc apk', reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/123?utm_term=test+dpc+apk+5.0.4 PDF link annotation
    • https://site-1168274.mozfiles.com/files/1168274/zekoboramemitebi.pdfIn PDF document text
    • https://cdn.sqhk.co/loxosefivipo/gidighd/tabogerisibezinuravu.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/jigdyjd/video_editor_for_youtube_salary.pdfIn PDF document text
    • https://site-1167950.mozfiles.com/files/1167950/ms__birds_of_prey.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423699/normal_5fca93bc3b98e.pdfIn PDF document text
    • https://cdn.sqhk.co/tidelefuzin/gghehgb/hitman_2_sapienza_sniper_assassin_suit_only.pdfIn PDF document text
    • https://site-1177041.mozfiles.com/files/1177041/live_sport_tv_streaming_free_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nunologen/egdifyj/my_fishing_life_shirts.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/zusevamasor/darkest_dungeon_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/medical_certificate_for_student_absence.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_off0000c21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21D 5340 bytes
SHA-256: 4d6d05566308455922e550010792500c6adc8e29587fc33f036ccf92b5c0c9a3
font_01_sfnt_off0000d46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46B 10616 bytes
SHA-256: adbd54e6cd5f07035d3df87036d50e9dc303f1d898d6e30e64b83d6b90cb556d

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