Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b9e3b24b0a786a…

MALICIOUS

PDF

73.9 KB Created: 2021-03-12 01:16:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2602d87a43d51540bac4674d27f8a5c9 SHA-1: dc436803b04842eb350644618b29bac927cd2642 SHA-256: e1b9e3b24b0a786a326fc73734adb4d53d18a2b2177176d5d30471c1083baed8
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting domains, suggesting a link farm designed to distribute malware or phish for information. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating a tactic to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/award?keyword=marketing+plan+pdf+download
    • https://bumaxaxup.weebly.com/uploads/1/3/4/2/134235918/11e8c50b7fa9d4.pdf
    • https://dekitinuro.weebly.com/uploads/1/3/4/8/134871397/4c717.pdf
    • https://static.s123-cdn-static.com/uploads/4368478/normal_5fef168c6cf5e.pdf
    • https://muxixeronazuxup.weebly.com/uploads/1/3/4/5/134508557/boxokurerul-wugonizuzuba.pdf
    • https://cdn-cms.f-static.net/uploads/4460230/normal_6016643f7b1ab.pdf
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5fe2b1f531eec.pdf
    • http://zudepogumo.medianewsonline.com/38592242138.pdf
    • http://vuzosemeve.22web.org/86705528583.pdf
    • http://mazikopipovix.mywebcommunity.org/books_of_the_bible_old_and_new_testament_word_search_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4459785/normal_600d5e966ed01.pdf
    • https://fotelosalif.weebly.com/uploads/1/3/4/4/134463398/144c5f.pdf
    • https://bazulerijodinib.weebly.com/uploads/1/3/1/8/131856415/8769248.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wepogevadapafa.atwebpages.com/biochemistry_of_fruit_ripening.pdf
    • https://938a05da-450f-421e-a59b-0448473a402a.filesusr.com/ugd/cb5dea_6f07823b49bb4207925d5228e7cf4429.pdf?index=true
    • http://siwojanapav.epizy.com/joomla_template_3._x.pdf
    • https://uploads.strikinglycdn.com/files/85c57ce4-e8b9-4fae-94b6-e3a2e835a8a7/21601022174.pdf
    • http://wavexijazibivat.myartsonline.com/27064869896.pdf
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_fc8bd68b12f647bf83fe40f292cd418d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f7ab5d82-1de2-49ed-b35f-4c85d9c45451/cub_scout_lion_leader_handbook.pdf
    • https://uploads.strikinglycdn.com/files/5b68f3e4-f4d3-4f3d-b56c-02eaa4366570/pobowem.pdf
    • http://lodonevubepivor.epizy.com/intermolecular_forces_practice_worksheet_with_answers.pdf
    • https://e1d5fa5a-667c-4d22-bb72-2ec96b4ed0f7.filesusr.com/ugd/01f30d_e9d8a600d03943b5896506dab7011308.pdf?index=true
    • https://uploads.strikinglycdn.com/files/112278aa-43f1-4c32-8eff-5d06754f7107/nanajovoziz.pdf
    • https://uploads.strikinglycdn.com/files/4372544e-e03e-4a14-b44a-6ee1dccc4994/what_is_the_best_baby_pack_and_play.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_off0000e64d.bin
e5c39be06fa7a040a5defb6e124ad88cffbb5947e0bd2b81a019619eb84084fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE64D 5192 bytes
font_01_sfnt_off0000f830.bin
30663bd43fac148f9f71375ca2182fa450bb9f1d8483472aa2d55de77c1c1151		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF830 10060 bytes

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