Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab540a869d75ff0…

MALICIOUS

PDF

64.6 KB Created: 2020-11-25 23:13:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2711bcbcbc4f8ab0c908530a8dabd392 SHA-1: 97aa7b9672d78d03671f716e4920af44a2acddf9 SHA-256: cab540a869d75ff0e66c0db966e4bd4f930740f8e9b0058a13a941552b06a2b2
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 invoice-themed 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 0.9998

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffmen.ru/123?utm_term=how+to+view+your+ebay+invoice In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375358/normal_5f9e82ba4787c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_5fa7be780530a.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/6c34f96c-adf5-40df-a380-b10e7fc5c50a/1_west_madison_street_phoenix_az_85003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37709261-7e66-4446-93c6-c1226de0ce4d/deep_water_culture_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/71984145917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa2ed2d-b8c2-42f1-912c-a52d5f4b156e/xaxut.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/kaplan_asvab_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e8a9d9-2590-4a63-89b4-21480f98765a/67662429232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880a3ea0-f5c3-4e45-b732-c098a8852589/beyond_diet_isabel_de_los_rios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2668d588-0177-409a-8b07-bc476d7a4435/329pd_frame_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da3d10c7-046a-4b03-ac61-dda7b4d555ce/chokher_bali_book_in_bengali.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_off0000c1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FF 4936 bytes
SHA-256: 91d3f73e7829339356ae6454cc87f9c3cc7126d492e37188704e69ac5bb30beb
font_01_sfnt_off0000d2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F7 10076 bytes
SHA-256: d67f7b102a1f6985dacfa31adc44494882ff6cd6f11db01ba390e986a0e31dfe

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