Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a96e389235aaab9…

MALICIOUS

PDF

68.9 KB Created: 2020-11-18 11:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c221f8c0d2751efc172f0daf36006db4 SHA-1: d11dc45d810abb7fa7ebf19d1cd94a22c22e1b89 SHA-256: 4a96e389235aaab9c5f54bb5b013f8feb08bacff5f5fe9aa8989e53c99fe389b
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. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=dimensional+analysis+chemistry+practice In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f8b50e9bd101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_5fa27705f1e80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f8f1fceb4fa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373985/normal_5f9f9c0b15d9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5f9c30c79c111.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5557cca4-a1dc-4261-8aaf-bf7de9f25bee/o_numero_de_adexe_e_nau_de_whatsapp.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/78859228130.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/15410294383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b7e340f-df36-4893-88dd-85c4ce91fa94/emoji_for_star_wars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4688c572-1dd0-4554-aabd-9dd723f3b277/32081191613.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/lines_police_cad_rp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86d985ee-7483-44bc-8bec-da2aaf67e962/vonaraxowivirote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b33ae40-7efa-4240-8c69-71bec95fb323/56493769983.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/anaerobic_jar.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/gazebujeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c79a2a-b64c-4693-88e6-f9c8b4526f0b/rg_games_dragon_age_inquisition.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_off0000cc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0D 5272 bytes
SHA-256: 2091c4b87ec4d133ef4f3cc30e16bf0af076b344ca566fbfab86265eb10773a6
font_01_sfnt_off0000dddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDC 12564 bytes
SHA-256: 4cdf1b677722398d53640305bfb08692228c05e882af172459dc8943de39db88

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