Malicious PDF — malware analysis report

Static analysis result for SHA-256 a041e6463d33f25c…

MALICIOUS

PDF

72.4 KB Created: 2020-12-26 20:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6c23a6cb6cedef47ff909ac07fcf8d3b SHA-1: 283e2d085d4202283b9aff482fe5f02a5aa1b904 SHA-256: a041e6463d33f25cec8c260e1a1f87c0d7e5408ffa5b58b8fae881c206990a61
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating a phishing or advance-fee scam. The document body, though heavily obfuscated, contains text related to 'lottery questions' and payment redirection lures, suggesting a financial fraud attempt. An external URI was also extracted, likely part of the scam infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://traffset.ru/123?utm_term=the+lottery+questions+1-8 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456389/normal_5fa2d13771cc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f9dcccc441f9.pdfIn PDF document text
    • https://cdn.sqhk.co/silinetufid/jOGGghA/us_conflicts_in_the_80s.pdfIn PDF document text
    • https://cdn.sqhk.co/vekasurox/Ej25hbd/ruterisojadijuzituxitemok.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/575e2bc3-6799-4edf-9a0d-0fccf07d2bfe/queen_bohemian_rhapsody_piano_partit.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/pdf_split_and_merge_basic_2._2_4_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c0a9de0-77d9-4dcb-bdcb-e24013fa72c4/7366949168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a38d68e-7efe-49f7-b7bf-31c1c9abfdcd/guwesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eff1a08-1dab-4011-8c4a-692d820fe343/pokotabixonepil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca85e95c-1665-4e3d-b337-8c5250568578/67206027722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f8f30e-d183-4e08-86c3-4330202f562e/70758131205.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_off0000df57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF57 5016 bytes
SHA-256: 6f3bb02e6993242fc920186f171a75dd2ed9de585e1d5b41052b42fc3ac4eb02
font_01_sfnt_off0000f081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF081 10808 bytes
SHA-256: 3f7a84fb5425ac327f0c6652b2f4e0d81000fb48cd2d03a6b9c8fe4352922c21

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