Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2244572886f5b3…

MALICIOUS

PDF

75.5 KB Created: 2021-03-28 17:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 493d954d05e900a1d043198181597904 SHA-1: e2c83f7746ebc8213e39a9d0a903cbbdd64c98e5 SHA-256: 9b2244572886f5b3940e43723c0667f73265a8581affab4987cdef77b4d67aff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, embedding numerous URLs that likely lead to phishing or malware distribution sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to this behavior, suggesting an attempt to trick users into visiting potentially harmful external resources.

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://resalured.ru/award?keyword=vejiga+neurogenica+urologia+pdf PDF link annotation
    • http://expressday.online/when_should_i_plant_tomatoes_in_floridaaxqly.pdfIn PDF document text
    • http://jushq.pro/dark_souls_2_best_magic_scaling_weapon1br5t.pdfIn PDF document text
    • http://obuv-kozha.ru/how_to_put_a_background_video_on_wixj9x6t.pdfIn PDF document text
    • http://biolinkus.me/80702646836ujml1.pdfIn PDF document text
    • http://matteset-spon.space/savage_worlds_deluxe_downloadqdiax.pdfIn PDF document text
    • http://auth02mobility.com/xetojkqbec.pdfIn PDF document text
    • http://domainlimax.xyz/molarity_practice_problems_worksheet_answersmqbjc.pdfIn PDF document text
    • http://trylait.pro/948671027289z0ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_6c8f95c0cdd94c089262ea5a469c2c25.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ragejufa/ruqyah_shariah_mishary_mp3.pdfIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_d231eb2b47d44f6fb4b4a491b722fbc6.pdf?index=trueIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_0649d40f17fd47b0bfa49e67d252b738.pdf?index=trueIn PDF document text
    • https://ef9d90ca-5811-4a1c-810e-75bcfae60121.filesusr.com/ugd/a33af7_97cabb7a3b7048c5ae70694a0ee8dbb1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megulu/google_android_sdk_linux.pdfIn PDF document text
    • http://rivamuboxu.epizy.com/38022673341.pdfIn PDF document text
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_78ac1470900b43be94b389f4cd92e77b.pdf?index=trueIn PDF document text
    • http://pajogapusifured.rf.gd/ligiwebosenosa.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/86419961067.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/how_to_get_penny_stocks.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_off0000e7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A6 5184 bytes
SHA-256: 64d9324f88412ac59bf1e50d77f383cbc72ab94599ebcb09a57ff42727b24b84
font_01_sfnt_off0000f96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96A 11672 bytes
SHA-256: 7c025bec0af0e02df9b9c5ec4e665f0861d07e412528d176a4b07197c092cac0

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