Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4170fdb5bb779ae…

MALICIOUS

PDF

70.8 KB Created: 2020-11-26 21:42:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b98a306c0929a08c95b29e78eb628381 SHA-1: b3a0b7a804bd1ea6515b04c44f9f204a8723ae29 SHA-256: c4170fdb5bb779ae36fd4a6c9046b0c6746ae75d20efb27c9a88a1fd459826e4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, disguised with a seemingly innocuous search query. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URL suggest it's designed to redirect users to a phishing or malware distribution site.

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://gettraff.ru/123?utm_term=coca+cola+mission+statement+explain In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386836/normal_5f9b3c135bf66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5fa89f08556de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479210/normal_5fbeb7212a966.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/votawawo/computer_parts_vocabulary_word_search_puzzle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/102704c2-ae1d-4ee4-8a7a-56be12fad103/3d_gun_blueprints.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8a94f4c-a894-4ad4-9584-8963ea1c74c0/jomozomazelonirikujilimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f79f29-a8a4-44b6-b976-ef6e1a2e05ce/lelotugedubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13b842f6-2b42-477f-8de5-82599e7caeea/97670320719.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/pukawokev.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/iraqi_dinar_rv_facts_august_19_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/gekijuxivimapumexelojika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fe2a75e-c117-4533-a0b0-bf718e058b92/vemidugasovisuvaputejoz.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/the_oxford_history_of_ancient_egypt_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d74bee-d940-4958-82e1-9de48f8c0924/bugera_v22_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/shoulder_muscle_anatomy_ct.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7288cd4-9917-4a84-9f5f-a582b436bc0b/13160504805.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_off0000d9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DA 4956 bytes
SHA-256: 9a53b745dcb63b16ea8de60df2f979e5bdfd9fc87f2745b8de806888e575df13
font_01_sfnt_off0000eaa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA8 10576 bytes
SHA-256: 255b3fc0270a1041fcbf969126c86cdb6955e21f030eae3e5cdb523609cd9c2d

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