Malicious PDF — malware analysis report

Static analysis result for SHA-256 af294d6a67ba4f15…

MALICIOUS

PDF

74.1 KB Created: 2021-06-01 08:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53abad686bf5e22f8f7af632f8164c4b SHA-1: ee099fa7a8b982750e41d86c18190d45cc00af8a SHA-256: af294d6a67ba4f1506058cf5aa2bde13f255e7b47b902725fd13283d9aeae315
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to file-sharing services, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards malicious URL redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/pbw?utm_term=introduction+to+radiologic+technology+8th+edition
    • https://divugukapo.weebly.com/uploads/1/3/4/7/134706398/d0a3027ceaa8.pdf
    • https://cdn-cms.f-static.net/uploads/4453551/normal_60433fffe0f0c.pdf
    • https://pisubamu.weebly.com/uploads/1/3/0/7/130740412/3015950.pdf
    • https://cdn-cms.f-static.net/uploads/4460950/normal_6045028ada0c0.pdf
    • https://static.s123-cdn-static.com/uploads/4495039/normal_5fe3e55496417.pdf
    • https://vijivavepedu.weebly.com/uploads/1/3/4/3/134313627/sogovelezixuvu.pdf
    • https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/291e0ea997.pdf
    • https://liburesaxus.weebly.com/uploads/1/3/4/3/134372769/a00bc3e349e.pdf
    • https://static.s123-cdn-static.com/uploads/4490917/normal_5fcd04e11cf9f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xojifot.pbworks.com/f/what_does_1231_mean_in_time.pdf
    • https://uploads.strikinglycdn.com/files/11fec4fc-f1bc-41ef-9d21-6ea8c539a994/kixitizipofovafuxuku.pdf
    • https://uploads.strikinglycdn.com/files/ddf9d0c6-4cc4-4f3d-8561-55ac900557d4/10176592456.pdf
    • http://kufujibumufa.pbworks.com/w/file/fetch/144424044/english_file_upper_intermediate_students_book.pdf
    • https://uploads.strikinglycdn.com/files/bb34e93b-f584-4bcd-b51e-48b13526838c/derebalebesidixopovedaw.pdf
    • https://uploads.strikinglycdn.com/files/0754b124-8b91-4764-9ddc-d023ab1e2ff0/bivubesuxerazatefawa.pdf
    • https://uploads.strikinglycdn.com/files/110c4d96-56c2-426c-a528-542fb9a47a23/71426741991.pdf
    • https://uploads.strikinglycdn.com/files/79f34d08-da14-4c1d-81a5-de2e49a5de04/youth_soccer_strength_and_conditioning_program.pdf
    • https://uploads.strikinglycdn.com/files/47a8047f-8cd0-4c48-9298-2357128e11ee/att_remote_not_turning_off_tv.pdf
    • http://mosijiv.pbworks.com/f/xulafaporixeg.pdf
    • https://uploads.strikinglycdn.com/files/d6e73f49-55d6-44dd-84bc-28e506169fb4/how_to_screen_for_borderline_personality_disorder.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4af.bin
fb4f17ff2d0e4340d01c2fc1e3107a86aa714880ea5c72613ad4eeb17aeb85a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AF 5256 bytes
font_01_sfnt_off0000f68a.bin
efb550c0067c2fcab80a2ddf6b284055fe518a2a996086a36c5b335c1b9dbb75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF68A 10588 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.