Malicious PDF — malware analysis report

Static analysis result for SHA-256 28402feea2eb57bf…

MALICIOUS

PDF

80.0 KB Created: 2021-03-17 21:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 513efc061c02fe751308da8a308958d6 SHA-1: 8f6e4c818b470555ae23bbf74e0e7e4d09eedd8a SHA-256: 28402feea2eb57bf79ef61efe1fdd5ce7e7fd5f8b9669e02ac146b7868b2aaaf
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 0.9990

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/wix?keyword=via+gelato+flavors PDF link annotation
    • http://biomanua.website/formal_wear_hire_mandurahz9066.pdfIn PDF document text
    • http://nubokokepiw.iblogger.org/sezoxoseragobekaxomogubuw.pdfIn PDF document text
    • http://kibizife.iblogger.org/active_listening_techniques_for_students.pdfIn PDF document text
    • http://sovetnik53.ru/4k83_dnr_downloadbggo6.pdfIn PDF document text
    • http://vufarilijofo.iblogger.org/8402188938.pdfIn PDF document text
    • http://rcasino.info/27132777743opecl.pdfIn PDF document text
    • http://cosmostil.top/38013735309v6fs5.pdfIn PDF document text
    • http://leadtop.co/jaxikebis892s.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
    • http://fokawodi.rf.gd/redux_form_dispatch_value.pdfIn PDF document text
    • http://punemipira.epizy.com/bisorisulam.pdfIn PDF document text
    • http://faxanudof.epizy.com/probenecid_mecanismo_de_accion.pdfIn PDF document text
    • http://litezopufesox.epizy.com/katalog_stop_kontak_panasonic.pdfIn PDF document text
    • http://lojogonofar.rf.gd/cabral_introduction_to_industrial_organization.pdfIn PDF document text
    • http://vetovolixexa.epizy.com/walofegiponat.pdfIn PDF document text
    • http://kodataruturi.rf.gd/how_to_fix_18v_black_and_decker_battery.pdfIn PDF document text
    • http://milodip.epizy.com/90903939683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71f2d3dd-4652-40e6-9aa0-2387284b10a9/11_birthdays_summary_shmoop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d15374df-c7ef-4861-bbed-526b0821232d/2005_chevy_tahoe_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c26a125-c2d0-4f3e-ae7b-46804793740a/asp.net_mvc_facebook_login_example.pdfIn PDF document text
    • http://sadigibesalij.epizy.com/null_zerep_granny_mod_menu_1._7.pdfIn PDF document text
    • http://lofadezowudekeg.epizy.com/75287319375.pdfIn PDF document text
    • http://senorumela.epizy.com/character_design_quarterly_free_download.pdfIn PDF document text
    • http://fumibomi.epizy.com/265448735.pdfIn PDF document text
    • http://musarozopod.rf.gd/60946997327.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 4644 bytes
SHA-256: 4469b7c386a3bd0e15772e80eda3b2d6e302a25605c1e7d399e323151478a57e
font_01_sfnt_off0000fd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD72 11592 bytes
SHA-256: 3a16ed0c1abc92586b6775ff06f6bc0b5ed8f671c95cb81785bf5417bb3e57eb
font_02_sfnt_off00012328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12328 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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