Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c752192ce2f23e…

MALICIOUS

PDF

60.2 KB Created: 2020-11-25 12:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f7cee1cd97c21e79bf63726985aea9dc SHA-1: eaab576b6421562d579535bba4a519387f403f6c SHA-256: c6c752192ce2f23e4a7e77b788156ddac593f9ad1ecfc4bf5a5b182b2d18bfcb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to PDF files hosted on file-sharing services, indicative of a link farm or SEO poisoning tactic. The primary URL, 'https://trafffi.ru/strik?utm_term=llamada+de+santa+claus+gratis+en+espa%25C3%25B1ol', suggests a lure related to a free Santa Claus call in Spanish. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing or trojan variant.

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://trafffi.ru/strik?utm_term=llamada+de+santa+claus+gratis+en+espa%25C3%25B1ol PDF link annotation
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/pebopopazawoze.pdfIn PDF document text
    • https://dajolulozofupo.weebly.com/uploads/1/3/4/6/134634221/bevuripipogo.pdfIn PDF document text
    • https://matubupediguja.weebly.com/uploads/1/3/4/1/134131452/ziriguvuwidekom_teniwakukani_maxidi_vurokonagig.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/vamuvepivudujajagab.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/fulejawovuwusez_loxevamovuder_rinuwanipuwebun.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/817444.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/591e8c07-9908-408a-b101-e3eb518cfd91/wikudezubuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16cc08ff-57de-43ec-8ad5-8979d4f8ed26/instructions_for_pampered_chef_rice_cooker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9613b691-0c0c-4430-983f-b6b9564b88f9/37624770302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b72d7dc3-1451-4048-81cf-3d5d657ef7fe/xakasulojulod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1bea4a-5868-4091-b92b-de636cbe2bb0/77141048022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7521a15d-bfce-4cb1-b6eb-8046f4b945d3/17773460175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7e15197-98fe-4fb9-89ab-0a6b7357de55/8182370081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/410f4e2c-3fc8-4de8-9adb-98be4fb77099/sword_art_online_volume_21.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_off0000ae7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE7E 5548 bytes
SHA-256: 77d36cb030bf29c4a34f7b0755322f23a5c2a82bc664e8551a80e4141359cf25
font_01_sfnt_off0000c105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC105 10192 bytes
SHA-256: 1820d48a089ba2e3811c2d1e30245d55e7170bf33f10f040f9c4528a68a42e96

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