Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65bacd174cd942a…

MALICIOUS

PDF

80.7 KB Created: 2021-03-14 11:05:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d19c536188cb645de63f3ea026474f62 SHA-1: 52c67f5a22e66422e18d6cc0db0f2143fa33f267 SHA-256: f65bacd174cd942a4f1d4d340a4134d3bc3eb8440614168f397f4f66902c370f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/strik?utm_term=what+does+rain+sound+like+in+words PDF link annotation
    • https://cdn.sqhk.co/givogaduta/jfieiig/magume.pdfIn PDF document text
    • https://cdn.sqhk.co/tojemapimibo/jahajiL/lemamoxeduxobogebono.pdfIn PDF document text
    • http://vatemuredaxusob.22web.org/kenorerad.pdfIn PDF document text
    • https://cdn.sqhk.co/panazomuv/eUfiiYV/52408906533.pdfIn PDF document text
    • http://vixitatevejiwo.getenjoyment.net/wing_chun_free.pdfIn PDF document text
    • http://dikegebe.mygamesonline.org/gidinilagibunas.pdfIn PDF document text
    • http://mizejodaf.mywebcommunity.org/game_theory_book.pdfIn PDF document text
    • http://rupazaduxil.mywebcommunity.org/fidulatot.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/r09jehd/82248468147.pdfIn PDF document text
    • https://cdn.sqhk.co/torazanopuni/jIEjehc/school_management_system_free_download_full_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a80fa56c-bffb-4e4f-b0de-9af32ac9074b/senate_election_results.pdfIn PDF document text
    • http://menepanago.rf.gd/aerodrome_reference_code.pdfIn PDF document text
    • http://tumupikujam.epizy.com/mululobekup.pdfIn PDF document text
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_298ed827a8ae479b9e3afd01604010f1.pdf?index=trueIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_58de4ed5a08a4abca3367ef6c030f1b9.pdf?index=trueIn PDF document text
    • http://nogibusap.epizy.com/20605419148.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/89793893741.pdfIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_c34ff038ab2b42d785b23fad69aaf1b7.pdf?index=trueIn PDF document text
    • http://reluwiz.epizy.com/accumulative_roll_bonding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a33e7b3-750b-4c2a-bd1b-32046cbeb057/dish_tv_number_to_pay_bill_by_phone.pdfIn PDF document text
    • https://ad0d0dbb-669b-46a9-85df-79487014a0f3.filesusr.com/ugd/00d95d_d0f46144dedb4abe9ab578509ba86212.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF252 4964 bytes
SHA-256: d79c4ef8e1b6c3cfc1596e18bc77bdf619c58eb13d1bb7c2f5d6752b0fcd9b14
font_01_sfnt_off0001033c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033C 10436 bytes
SHA-256: 6ed8648b0c85737a460ef4de102a566beef9146b39e36a75609a8a878ad8d6f6
font_02_sfnt_off000126ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FF 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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