Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f2f8088b1bcf1c…

MALICIOUS

PDF

65.1 KB Created: 2021-01-16 16:55:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8417200b78a314e227f5cac275d51d5d SHA-1: cdac8adcb114f4811f90619f5f6960e1db9d492e SHA-256: 70f2f8088b1bcf1c061513e741947126a73fb2e32b8d1bb4e2a469be55b74ccc
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://traffine.ru/123?utm_term=tmnt+dark+horizons+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f8d2cd45e79e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528260/normal_5fdef2808dcd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385010/normal_5f9e829e6c8b0.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/gcgfjcW/bififajivoxisuzamuwon.pdfIn PDF document text
    • https://pibowalemarume.weebly.com/uploads/1/3/1/1/131164440/8813961.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/4RDquJx/freebies_bsnl_meaning_in_malayalam.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/mutirexa/1479619845.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/safety_data_sheets_for_asda_products.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/benami_property_transactions_act_1988.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/no_fear_shakespeare_a_midsummer_nights_dream_act_3_scene_2.pdfIn PDF document text
    • https://s3.amazonaws.com/sanekufiwumafo/afk_arena_unions.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_off0000c1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E7 5220 bytes
SHA-256: e504a9f74945d7179f6ae4fcd5d7466e04cff595e98456c528ed1f01b12fb395
font_01_sfnt_off0000d390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD390 10900 bytes
SHA-256: 762d0b48435a5aa3a319451bd941a0fdb38f8c638e7ca5f31a3f08cd82a2b8fd