Malicious PDF — malware analysis report

Static analysis result for SHA-256 48521a66c286f473…

MALICIOUS

PDF

70.6 KB Created: 2021-03-24 12:17:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4d55427f65baa65fe0bdbf2ad0b7b32 SHA-1: 845e7f57a2e372a8819f3f65a575b736fd2c880c SHA-256: 48521a66c286f473e5644f7438b7a98e90f47e7239a359f6e015a2224697a719
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to search terms, directing users to potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://lozipotod.ru/wix?keyword=i+shall+not+be+moved+ukulele+chords
    • https://cdn.sqhk.co/febutatesu/SJwjgdm/74044405266.pdf
    • http://winoraama.site/dolalalunwh5m.pdf
    • https://cdn.sqhk.co/makafabakuna/czhhd8X/vakepugu.pdf
    • https://static.s123-cdn-static.com/uploads/4378157/normal_5ffc4b5263dfe.pdf
    • https://cdn-cms.f-static.net/uploads/4410191/normal_5fd18a57c45f0.pdf
    • https://cdn-cms.f-static.net/uploads/4460071/normal_6010a114ddc25.pdf
    • http://bigowet.xyz/32594590817r7288.pdf
    • https://cdn.sqhk.co/nowavutu/gfv3hba/jumuru.pdf
    • http://verification-help.business/the_descent_of_man_grayson_perry_freerenz1.pdf
    • https://static.s123-cdn-static.com/uploads/4474220/normal_5ffd0ef606f15.pdf
    • http://labincom-med.ru/calculus_concepts_and_contexts_3rd_editiona2p1h.pdf
    • https://cdn-cms.f-static.net/uploads/4417129/normal_604a9318becd9.pdf
    • https://cdn.sqhk.co/sajixobuko/lFjhqN8/download_apk_beauty_makeup_photo_makeover.pdf
    • http://interbankdigital.com/buvedegurenitumejewazonub79r2.pdf
    • https://cdn.sqhk.co/zezetemirag/hihjVel/2661168276.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2cd06f36-38f4-47ee-8ecb-d664bd697f68/wonder_book_via_chapter_summary.pdf
    • https://93641f3c-03d3-4c8c-b6db-0fd9bfabe798.filesusr.com/ugd/384ca7_0a9ee2a67e96469fbac1bb28481b2eb0.pdf?index=true
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_5a70f85fd0844c6db6e3da3ebe0fbc76.pdf?index=true
    • https://uploads.strikinglycdn.com/files/84d0759d-5523-4ea2-a1a4-d3efc22fb842/beer_pong_table_height_dimensions.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_off0000d859.bin
da62b5d0afa0eec2e93130c924e285ce3fbb6aae9ac39c54a093875955300009		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD859 5380 bytes
font_01_sfnt_off0000ea7e.bin
e89298f3a555f5fb7fbda0c9d49f9846bd653ce634ce88f21a393ed780c0d24b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7E 10116 bytes

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