Malicious PDF — malware analysis report

Static analysis result for SHA-256 987d32203e391a41…

MALICIOUS

PDF

158.3 KB Created: 2021-03-28 00:00:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b46bba82d3be9fdcc29f7c27a155c903 SHA-1: 537c92587cc7331f9e230cd8f37c82fe34987efb SHA-256: 987d32203e391a41f273f202f6666048f8291d73935f40924c3a01b988dcae92
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a URL that mimics a search result for a technical book, likely as a lure. ClamAV detection and ML classification strongly indicate maliciousness. While no scripts were directly extracted, the PDF structure and embedded URI suggest it is designed to trick users into downloading further malicious content, potentially through a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/wix?keyword=transact-sql+cookbook+pdf PDF link annotation
    • http://frontglass.xyz/42920958065nxw5s.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CFgdiND/wobokosomapodotiw.pdfIn PDF document text
    • https://cdn.sqhk.co/wipabamof/hiwvhe3/6577761503.pdfIn PDF document text
    • http://adv-workshop.site/73309453089j5n76.pdfIn PDF document text
    • https://cdn.sqhk.co/wirepoti/xgghjjj/anger_management_certificate.pdfIn PDF document text
    • https://cdn.sqhk.co/zegegajugot/bieOHgc/soposujaw.pdfIn PDF document text
    • https://cdn.sqhk.co/rupomotiz/jeqhhFl/doomer_boy_emo.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/punagilelabon/vadawotelaviwaba.pdfIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_b90a1817d5484a05a2f0b6ee6d60591a.pdf?index=trueIn PDF document text
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_b8d2055a8ea94a44ad9d571818faf565.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/how_much_does_it_cost_to_ship_internationally_dhl.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/what_is_the_life_expectancy_after_being_diagnosed_with_als.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/autodesk_sketchbook_crack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/fubegizamaduwogozepotewij.pdfIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_e03a4d26ee6e47948aabcc86d1914969.pdf?index=trueIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_d6f0dbf022374b09a1bac907292ca79e.pdf?index=trueIn PDF document text
    • https://9e1e9198-0fe7-4103-8084-fdcc6befb8d5.filesusr.com/ugd/2f7815_2f78600293c04eebb563328000f01666.pdf?index=trueIn PDF document text
    • https://66c7139a-03c0-45fe-98d3-e817d1e01442.filesusr.com/ugd/de2db5_a9e4004f31a7411e80d5c15ff41f2754.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/financial_reporting_process_controls.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_off00023135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23135 5460 bytes
SHA-256: 1d185d586abea596824f19ddb659d170eddb0969cad735d54a11f8d2dc6d5f43
font_01_sfnt_off000243cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x243CF 11756 bytes
SHA-256: 09a86ec9b8802e167fbf26255f3bdd706c8be075f4383cd5c598f806cbd65af9

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