Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d284adbce377b9d…

MALICIOUS

PDF

88.6 KB Created: 2021-04-05 23:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 35ae3434e3b781128e27487ed80f7b17 SHA-1: 53508b6248d57cb2a3301d029df6f7d532882ffb SHA-256: 8d284adbce377b9d5a1fffab7c4f7a7c88403b38ed1729a271b5ea126c42cb0e
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 0.9994

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://baarspo.ru/strik?utm_term=one+dark+throne+book+order PDF link annotation
    • http://www19216801.site/bbc_learning_english_lingohacksc9a6.pdfIn PDF document text
    • http://dayzcommunity.info/lg_plasma_gold_air_conditioner_remote_control_manualspryk.pdfIn PDF document text
    • http://gravkamen.ru/64936516099se59c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474734/normal_6045e5fd19023.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/school_meeting_agenda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454678/normal_602d5b0d4c8be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427811/normal_601fc60017ef3.pdfIn PDF document text
    • http://tradestaroffice.com/nail_salons_open_late_on_saturday_near_mehps9k.pdfIn PDF document text
    • http://tugokutuli.scienceontheweb.net/tratamiento_de_absceso_hepatico_amebiano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449205/normal_5fdc3f8c9bbc3.pdfIn PDF document text
    • http://tibagisuminove.sportsontheweb.net/articles_exercises_for_beginners.pdfIn PDF document text
    • http://pudumalezedokav.22web.org/management_accountant_cv_template_uk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zakefuki.myartsonline.com/28768115232.pdfIn PDF document text
    • http://mifedisiso.atwebpages.com/color_by_number_kindergarten.pdfIn PDF document text
    • http://xexobazetozi.epizy.com/relixelomimuz.pdfIn PDF document text
    • http://bisiziwaros.epizy.com/fujitsu_scansnap_ix500_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6994b217-03c8-4945-9360-db5ef1a8b5af/62518542521.pdfIn PDF document text
    • http://ferodokibaw.epizy.com/happy_birthday_audio_song_for_husband.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49cb1625-dfd1-43b9-a1ac-38eba4a8fab5/15218330354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/831d9dae-5385-4c68-97f9-6d7948ed0af4/swann_security_system_network_setup.pdfIn PDF document text
    • http://jigosip.epizy.com/56031867125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/215537ff-018b-4777-9a93-daf46e73555e/zedubedixojeludoxe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10955 4936 bytes
SHA-256: 9b3357012c4cbc8be546c06e744a67eabcd8cab53a1f61fa1f4a63611a06a249
font_01_sfnt_off00011a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A10 11116 bytes
SHA-256: 778b20d54f79eed309714ab4ca7bff465739f1a40cda728bac65c19fa4ea0a50
font_02_sfnt_off0001402e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1402E 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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