Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43e723bb496120e…

MALICIOUS

PDF

60.9 KB Created: 2020-11-25 11:00:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c7f515ca3e52d7b1bffdfda6a6d619d4 SHA-1: 98eca18ee907882d3bca084db7c9c99b87487b4e SHA-256: f43e723bb496120e8d80d722fcfe7201c8897aa86079368637d680deeccd7785
162 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. It uses an urgency-based lure. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gettraff.ru/strik?utm_term=cancel+wwe+network+reddit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_5f98aa077e190.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/gofiguj/41785212498.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/microsoft_sql_server_management_studio_format_sql.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/economist_5_may_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/58506640337.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/madufikipepenojuzozotowi.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/avenir_font_family_free_for_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/tewadukob.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/93585830427.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/nowewibusakowugon.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/gawanoned.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/bupejaragati.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/precious_moments_photography_wi.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/vevutufusiwikojowixa.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/raid_air_basketball_unblocked.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_off0000b4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FE 4816 bytes
SHA-256: 729146d37772614c4df96d1ed3461262c97ecc58813c5b4a0cd33d581ba582a8
font_01_sfnt_off0000c57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC57A 9856 bytes
SHA-256: 70766a4e264d84ebe483ba3c682f2065756e8b1b5adcec8c4269cc7d10b1bede

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