Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf9892b81f38a03…

MALICIOUS

PDF

73.5 KB Created: 2020-11-10 21:30:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 53c7478b0aa00f5d049a2542f0ed5d56 SHA-1: 2e2ab6b06ece5b48a69b23826770bd73c84649b1 SHA-256: ccf9892b81f38a03477486629e42275e3a3dba7998bd66f69d94dd94203b1fee
156 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to 'traffset.ru', which is suspicious given the 'PDF_SEO_LINK_FARM' heuristic firing. This suggests the document is designed to drive traffic to external sites, likely for phishing or scam purposes. The ClamAV detection and ML classifier also strongly indicate maliciousness. No scripts were extracted, but the presence of external links and the nature of the heuristics point towards a phishing or SEO-based scam attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?keyword=netgear+wireless+bridge+r7000 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5f8c116069683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5f952f48157f2.pdfIn PDF document text
    • https://disinuxokisukoz.weebly.com/uploads/1/3/4/6/134610262/pavukaniwewisi_vevudi_kafuzit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370051/normal_5f9c6f585043b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5f9134a017d52.pdfIn PDF document text
    • https://fepirajoruvizu.weebly.com/uploads/1/3/4/3/134311883/c79f86.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/donake/97458928141.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/6640735703.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/jasuve.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/62252345768.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/wedojugitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57590351-e64f-441f-bb60-764c019f9bbd/maryland_contractor_license.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16a5984-0303-4145-8ab8-f4c80f4e210a/hp_15-_bs192od_review.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/marvelous_designer_portable.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/apk_king_root.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65D 5416 bytes
SHA-256: 8537f2b26fa977c8550416ae44c2b9db02120c2e498ff88d76f4ad51fc780a68
font_01_sfnt_off0000d8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EC 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0000e44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44F 14612 bytes
SHA-256: 56950b469b4f587c341ac5f5d7789c26edd8cbd03baa796d8bc4b21a75e656da
font_03_sfnt_off00010ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE7 2896 bytes
SHA-256: bcfe0a16b5d426672f55af914518dd5fe1cd56c35dcde07fc066d4c277cb70a2

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