Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce23558745e3db3a…

MALICIOUS

PDF

80.5 KB Created: 2021-02-17 05:37:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 95af70516f51e8b8f705d1c5286783e2 SHA-1: 2af6d00a9d40c1d3167e5b47b8ab63948a6b4b05 SHA-256: ce23558745e3db3a047558c0447f2fdfdd2ab9e22a64bb4b0c118adeba516318
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains an embedded URL that leads to a suspicious domain, likely intended to host or redirect to malicious content. The document body, though heavily obfuscated, suggests an attempt to disguise the malicious nature of the file.

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://crophysi.ru/aws?utm_term=grounding+tips+for+dissociation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448547/normal_601f93ee3ae3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5fd62a03cb000.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/c6IaLew/vinonesusiri.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/6vifgeZ/evolve_hitmonchan_sword.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416151/normal_5fe77c4bc60a1.pdfIn PDF document text
    • http://zixosoliga.iblogger.org/22928863159.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/60XDfYs/rotten_tomatoes_netflix_documentaries.pdfIn PDF document text
    • https://cdn.sqhk.co/livisade/ehbgfkR/zixibesimu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409413/normal_6021a56e43c9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462046/normal_6002100a5e00c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475719/normal_6007b1911ef91.pdfIn PDF document text
    • http://takimopunize.22web.org/bosch_ecosense_dishwasher_reset.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454290/normal_5fffa0cf1b6c1.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/xeponodij/60712100439.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/acdsee_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/48532005044.pdfIn PDF document text
    • http://sejozewixexoba.rf.gd/asfa_apheresis_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/vegix.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/is_bullying_a_formal_word.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_off0000fece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECE 5324 bytes
SHA-256: 81008dea51bdb54a5f79d8780ce917fb4caaa86d1c1e51b229d34064c127f7e9
font_01_sfnt_off00011102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11102 10380 bytes
SHA-256: fa7d6f036a18029adbdcb661ec8228ad8bc0ad95f982f72c1b8840819fff8032

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