Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1b93d940fc51a4…

MALICIOUS

PDF

66.3 KB Created: 2021-02-18 03:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 73620bfb8fef1323799e80d0b2b96557 SHA-1: 8cac8a6200c53d2f2ad01866fe25d608ec766a0b SHA-256: 5c1b93d940fc51a4e11922209d98f11ebf530c30bfcfadc146af99d2695c7a42
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains a URL that appears to be a lure for game-related search terms. This suggests an attempt to trick users into visiting a malicious site, likely for credential harvesting or further malware delivery.

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://baarspo.ru/wix?keyword=saloon+brawl+unblocked+games PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367668/normal_5ff7736113cc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460708/normal_5fde4ffc446de.pdfIn PDF document text
    • https://cdn.sqhk.co/pulizojiwim/cyd9G9L/pizabarogowaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_601b652ba850c.pdfIn PDF document text
    • https://cdn.sqhk.co/xemuxebu/jgG6R9D/9379967901.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/jJGhamq/14015949746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486353/normal_6022dcf24669d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408851/normal_5fdf2aa1010e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425227/normal_600a9dda6d8d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474736/normal_5fd1f7b486466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380540/normal_6016a6558995a.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/jfHjdij/rules_of_survival.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/jbhajjd/horizontal_line_test_function.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488807/normal_601b56923582c.pdfIn PDF document text
    • https://cdn.sqhk.co/xugumewaz/ReMzieo/redcon_total_war_review_bodybuilding.pdfIn PDF document text
    • https://cdn.sqhk.co/woguwubege/Gjiibgh/video_downloader_for_all_tiktok_no_watermark.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/sedimeraxufi/neniles.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/53302257300.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/resignation_approval_mail_format.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/97167821486.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_off0000c80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80C 5656 bytes
SHA-256: 6ca3c3329988ac3a671100979fe61d71ab41adc826bc689152d2c979e5682ffb
font_01_sfnt_off0000db4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4C 9576 bytes
SHA-256: 73d83a1bf6bd1e4ff3bb76a20fc57eaac743b8fd97cd734d32b5547d2b5c6403

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