Malicious PDF — malware analysis report

Static analysis result for SHA-256 650519ede92c4985…

MALICIOUS

PDF

80.8 KB Created: 2020-12-26 05:57:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5e18fab3f2247842cb4fa1b797767e65 SHA-1: e41d24bca3e735437ef1060832d7d09455a7eb00 SHA-256: 650519ede92c49857fcc7e9aaef66fead289ea734edf063bc011f1b7a55ee2db
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent URL pointing to 'traffset.ru', suggesting a phishing or malware distribution campaign. The PDF structure and embedded content, though heavily obfuscated, are consistent with attempts to disguise malicious links or exploit vulnerabilities.

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
  • 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=com+proxy+free+ultimate+vpn PDF link annotation
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/renubovigefisamopedo.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/b66dc25b-b16d-4550-be3e-f704bf0e2ed8/43993548973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6918635d-9c52-4a53-8249-4a66cbf6aa93/rewibevenowadikikosis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/815e825f-26ac-40c6-8aa3-b53f3ea69ab0/coraline_full_movie_in_hindi_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93737a54-4cea-40c0-935c-3bcd49fa91fa/73890933897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e99df7d-1b2b-4900-85d6-0457a0c3b435/10579083293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5933dfb-9b39-4ed9-b771-5e4a981cd648/iso_9001_2015_clauses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f6d32b8-f57c-4b37-8e20-57beddb121c5/faputepirisafigipozoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eca42ff-e76a-469f-8085-9cf447f00590/the_20_20_experience_deluxe_edition_download_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d92496-cef8-4def-8f60-45aa94a78fb7/zizebudunib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba4e8b41-5f0a-4f38-9240-7915ebc5eab1/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a065bfe6-e663-4b2d-927a-258057435ddb/90133309593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26cec47d-180a-4c52-872a-2e38f66175ac/madalin_stunt_cars_3_google_sites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fef035fc-6102-4b6f-ac08-54f7772f6386/eldorado_memorial_library_eldorado_il.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/54703421423.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011ae0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11AE0 17692 bytes
SHA-256: 0eab233705170471edcee6d4cd0041fdc6ac0c916789ed9c06dfcc3531f68411
font_00_sfnt_off0000e5ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CA 5004 bytes
SHA-256: 02a2455bbdbe8d96b53b9613c9ba16de26582bb596ef74225d72e91615f4c53a
font_01_sfnt_off0000f6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C4 10568 bytes
SHA-256: 436ce755ae8be7e413fc5056d4c0dbfa55a385227b56a9265d2967dc04cdc5e6

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