Malicious PDF — malware analysis report

Static analysis result for SHA-256 6210bdf5f60d563c…

MALICIOUS

PDF

73.4 KB Created: 2020-12-23 20:01:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 82507e06212938417386da4efbf53fca SHA-1: 7a09401fe6527728e888b80bfaa0f4e2fc642724 SHA-256: 6210bdf5f60d563c3af934afe51be9c4bffa2e3f7facaed746dc5b603300d5fa
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm, with the primary malicious URL being https://trafffi.ru/123. This heuristic, combined with ML classification and ClamAV detection, strongly suggests a phishing or malware distribution attempt. The document body is heavily obfuscated and likely contains exploit code or further redirection mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/123?utm_term=diagrama+de+procesos+de+operaciones+que+es PDF link annotation
    • https://rijevolokawuja.weebly.com/uploads/1/3/4/6/134661742/nejesiwin.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdfIn PDF document text
    • https://cdn.sqhk.co/gulijolane/hakgjiP/alone_movie_2020_ending_explained.pdfIn PDF document text
    • https://pemiroma.weebly.com/uploads/1/3/1/3/131383733/xexidi_jejupotezu_dadimefo_zipuwaxitepevi.pdfIn PDF document text
    • https://cdn.sqhk.co/tadawatimi/eidlvib/3d_galaxy_map_pro_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dadakafopina/cgeCihT/best_good_night_stickers_for_whatsapp.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/8db8fa1a-4b5b-4bf8-bb94-fc64a3d14dc0/moxabafusobafovav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02565dd1-9023-4b40-92fd-e3f9a3923add/lojimumosabuvadogip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b564ff42-e47a-417f-8cc5-adb5ab4bd132/68392171988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5460bf25-d632-474f-8074-2ad3179dabcb/20508347529.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_off0000dcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAB 5484 bytes
SHA-256: d892f3b57897034238344ea080fbc85729f58c57764355a64f7622806e2e2661
font_01_sfnt_off0000ef3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3D 12288 bytes
SHA-256: 1918123b860a9a058aacf8635ed0da3125c23e4db7eba0386e6c1ecbf5007322

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