Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15b996d79436bd4…

MALICIOUS

PDF

78.4 KB Created: 2021-03-26 00:05:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 369f29cfc2a23c180097a73033ec18f1 SHA-1: 119206b56a48b337cdd4fbf2be5f0e978d3765af SHA-256: f15b996d79436bd416df7d1ca6aa7509ebbdeb8416f6568b9ac220b0bf6f3e63
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://xajibur.ru/123?utm_term=ielts+writing+task+sample+answer+band+9 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4504788/normal_603446fd7ce78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376852/normal_6018f775d1178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383160/normal_601bb30dd51d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488592/normal_5fcd768fc8fd7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a9f006-d6f5-4c58-9b12-640475161b78/how_my_body_works_book_series.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/raredimegavusesalariz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f801151c-1ca0-4ab6-8009-67e98da196c1/who_plays_ben_in_the_5th_wave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375d4bc6-7d4a-4efc-a44d-e6368dfd13fc/sidep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5e6275e-7091-4eec-b0a4-2855296da7f1/how_to_stock_market_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be15a19d-67d6-458d-a6e4-30530056cf3d/putol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/633b7efc-dda0-44b5-a16c-28683ba4b37d/garmin_dash_cam_55_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd67c97f-681d-4fcf-94e3-ca78039abdb6/8599424598.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/58347234340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e0c3bf6-da69-48a2-b3b1-feb4b0abeeca/227252396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/041009a3-051c-4410-9491-2e8b611846e6/35232285785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/502c1d01-165d-4515-8ea0-00cd805bdf86/amazon_presto_profry_deep_fryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7324effd-4aa4-46e2-99bd-05ea0cde2b7f/35041684015.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_off0000f253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF253 5668 bytes
SHA-256: 5002142ac06a751ad7ac9cc0302d864dfea2e8b1139785100d958679d24f4c68
font_01_sfnt_off0001058d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058D 11532 bytes
SHA-256: 75e0e703c9ab094e775b6848bae6335200a5dfd69aaf548a0a035fef27744b3f

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