Malicious PDF — malware analysis report

Static analysis result for SHA-256 1163dd97c9883ba8…

MALICIOUS

PDF

102.5 KB Created: 2021-03-11 08:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8c0202d09614462e08546641bea9b044 SHA-1: 5e0335165a9587f6704fc5ef84919006b65daff3 SHA-256: 1163dd97c9883ba8f50cd9b627d095730eff654ee19103fa2f4df489d23100c1
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 0.9973

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/123?utm_term=usatestprep+answers+english+4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5fdbf0d12d47c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410030/normal_5fcb1003cd23d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_601a04df3aac0.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/hdjjicu/rolling_stone_magazine_september_2019_harry_styles_cover.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417408/normal_5fc7c33933aeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421214/normal_604918cd41299.pdfIn PDF document text
    • https://cdn.sqhk.co/wujukipako/pPhf5GO/numamu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451575/normal_5febd3c28a703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_5fd847c664e6a.pdfIn PDF document text
    • http://lidobexi.22web.org/33972877100.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/cFgjhgN/23793584050.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453342/normal_5fef81b970c69.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/jhJnWhf/apache_tribe_of_oklahoma_higher_education.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/bG54X0M/96385872479.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371246/normal_5feb7a7ecb2d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460966/normal_5fc9f67e48dc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_60432fd2b65fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368976/normal_5fcc07cec3870.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rodudupisebi.rf.gd/was_fresh_off_the_boat_cancelled.pdfIn PDF document text
    • http://fubaragete.rf.gd/46605650852.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/verbs_tenses_worksheets_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/celebrate_recovery_bible_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/6th_ieo_answer_key_set_b_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/omegle_tv_unban_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/53920787777.pdfIn PDF document text
    • http://gaguvidub.epizy.com/what_does_signal_mean_on_maytag_dryer.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_off00015524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15524 5252 bytes
SHA-256: 488bf84a678899b8b5fa4df8a130aae0ea2c2ecfdcf1081d945452178d7a1852
font_01_sfnt_off00016713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16713 10920 bytes
SHA-256: 475be45d6d2366c7db05fbbfd90a02c51ec6dec703ae446bb86fbb6d2fb4185c

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