Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aae24792dd93db2…

MALICIOUS

PDF

67.2 KB Created: 2020-11-16 15:08:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a142bc4a82c0572da4d020beedd017b7 SHA-1: 961f79b9fbf6086f9a2f1cb2f6c2360a61223581 SHA-256: 5aae24792dd93db2221803eab8ea873b3d2caa64fbf14fb3b1881bb17424d910
156 Risk Score

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. The file embeds a large number of external links characteristic of an SEO link farm. 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-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://trafffe.ru/strik?utm_term=gamecube+adapter+driver PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382949/normal_5f8f5c8163e52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_5f9e383274d10.pdfIn PDF document text
    • https://likerediweraj.weebly.com/uploads/1/3/4/6/134691167/bepefapifurif.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/pibabopuduj/puzojodewas.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/burger_king_chicken_sandwich_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/noloduwomerozegafalefadow.pdfIn PDF document text
    • https://s3.amazonaws.com/newopetusam/wildlife_photography_website_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/kajujugivurixagelusasosuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2902ba3c-7e35-45fe-bcff-ea27cd06bdb3/telufujibotu.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/jigevaretijidarorezobob.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/breadtalk_annual_report_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/dreamcast_apk_download.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_off0000c7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B3 5240 bytes
SHA-256: 3d37ac259e99b15396e6e79b8a34c2f7b975f0594e791c3add7c9d9b5d36e0f0
font_01_sfnt_off0000d971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD971 11496 bytes
SHA-256: 68c748a68eda989d51a2eaab22d6e398414227a00986072baf1d076af330e35f