Malicious PDF — malware analysis report

Static analysis result for SHA-256 98746010f0dce7b3…

MALICIOUS

PDF

86.6 KB Created: 2021-02-16 20:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4970497a3a80940957dac3046cb5eb28 SHA-1: 6d9a4096ee2189371a2c0be1f9b4ebf93e3f4612 SHA-256: 98746010f0dce7b332ff01d47fb8e8bfec3a1ea9e95299c6519a5c945cd45fdc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'crophysi.ru'. The ML classifier also strongly indicated maliciousness. While the document body is heavily obfuscated, the presence of a malicious link suggests a phishing or malware distribution attempt, likely initiated via spearphishing.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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/123?utm_term=computer+specs+for+wow In PDF document text
    • https://static.s123-cdn-static.com/uploads/4466175/normal_5ff2a4203ed22.pdfIn PDF document text
    • https://cdn.sqhk.co/xipapotug/gmhdoms/parallel_worlds_book.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/fQGQxij/monkey_go_happy_four_worlds_4_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/tinukomafiro/jggjDU9/bus_driver_simulator_free_download_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480893/normal_600cc35357342.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/ieQAgjk/forasixalizutumigufumuxal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501380/normal_601e210278d4b.pdfIn PDF document text
    • https://cdn.sqhk.co/naxusepimosa/djgjgjg/top_50_marketing_companies_in_usa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403262/normal_5fd8cab375319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_5fd5f5346a324.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xojaxalevigob.epizy.com/88013357465.pdfIn PDF document text
    • http://muzafevabuma.rf.gd/tetesivotutipato.pdfIn PDF document text
    • http://vipowiso.epizy.com/ginawedarosomu.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_off0001160c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160C 4916 bytes
SHA-256: 871336ba2dcd82f567b40ed70ead1a3002c40a504722dbf7a8b202a1c1a24539
font_01_sfnt_off000126c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C4 11732 bytes
SHA-256: 2655e8f31ffc17db9b779b532150036f7364adca2b5f6260dfc8fed924ad9a68

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