Malicious PDF — malware analysis report

Static analysis result for SHA-256 30571b13cf99ada0…

MALICIOUS

PDF

81.4 KB Created: 2021-02-12 21:57:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c5d44791fd8961db93bfe886b1de5392 SHA-1: 2dcf8b1948d574a53dc7be727f37103330fdaa53 SHA-256: 30571b13cf99ada02a2f94f7979715f7d77ffb00bc64a24f47f56916cb0b337a
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 0.9997

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://maypoin.ru/wix?keyword=equilibrium+constant+expression+worksheet PDF link annotation
    • http://lnstagramverifiedsbadgeforms.com/33922292425gtz20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460975/normal_5fc96a06c9613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452171/normal_5fe6def7d3601.pdfIn PDF document text
    • https://cdn.sqhk.co/gokovolasula/gdgcjeu/67355631396.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409405/normal_5fc951fe0ab9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380384/normal_5ff0a984019cb.pdfIn PDF document text
    • http://bhd-management.space/reporting_cronbach_s_alpha_in_tablenn6a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425483/normal_5fe777896e2ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419629/normal_5fe39d9495d47.pdfIn PDF document text
    • https://cdn.sqhk.co/sutadejuna/igsYjaC/stack_pop_time_complexity.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486969/normal_5ff3017a07b64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_60110ead5872f.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/ifw6igd/tic_tac_toe_puzzle_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425726/normal_600e9daf5bc19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/mowinop.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/88153055293.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/92929615794.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/xabevotugixikamedowadela.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/56574473619.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/buell_xb12r_performance_parts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF87 5504 bytes
SHA-256: f877e3f0e9d23d9e5bd8e64a115cad571ac1680212827955325d81443eac5f0b
font_01_sfnt_off00010222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10222 11572 bytes
SHA-256: 6b8ae2d9185d39372dc3b484f91c774e0df1658b5879b156cd20ef2ed5e75024
font_02_sfnt_off000129aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129AA 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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