Malicious PDF — malware analysis report

Static analysis result for SHA-256 958ae66342aefb1b…

MALICIOUS

PDF

65.4 KB Created: 2020-11-13 13:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9797e8bdc803d24f64eb2ac0908c7582 SHA-1: c8726eb60964b886b2fed253eaea7317d86bbb40 SHA-256: 958ae66342aefb1b9bb051516c9bb691e3ef973d39a90d9c5ed0fba3ab5ce275
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing document and hosts a large number of external links, many of which are suspicious. The embedded URL 'https://traffset.ru/strik?utm_term=isaiah+rashad+smile+download+mp3' is likely used to redirect the user to a malicious site. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/strik?utm_term=isaiah+rashad+smile+download+mp3 PDF link annotation
    • https://zororoxuz.weebly.com/uploads/1/3/4/3/134309160/wirejuwewurewi.pdfIn PDF document text
    • https://wuvepadin.weebly.com/uploads/1/3/4/7/134714831/96f19d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486566/normal_5fad7d5d24aaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393208/normal_5fa6074557f1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386091/normal_5f9804ce7d778.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/44aa68ba-61ce-4f1e-9326-9fb00cf57102/wufine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554e4799-93ea-4790-acb5-8e9b934e4464/98228074078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b141af3-aed4-4eee-89a8-94fdcfd418cc/66004053007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6142b14f-7a05-40a4-bdb2-20be5ea7682a/2nd_edition_d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d28063c8-f5e9-4df2-8354-aef08f0c3714/the_green_book_redbox_release.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9886db5-caa5-4480-9f7b-4b2d07c78933/19714996603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dc4f4dd-e0d8-4df8-bbfe-710b0f90e282/words_starting_with_letter_r_to_describe_someone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/460e99df-8500-4eee-87fc-381e4e36b709/72014692658.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_off0000bde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE1 5392 bytes
SHA-256: 5d4031eccd6b84ad899f40e423c87a9d97da9adfff38a48340e58a7c82c879ff
font_01_sfnt_off0000d021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD021 11504 bytes
SHA-256: 68d9d6007e74935d3a58f3d0a5586e4bea0cb7bd470cfb93d403ec51c469cb4a

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