Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9693d714f6a7c2a…

MALICIOUS

PDF

70.1 KB Created: 2021-03-06 03:17:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4e9edd441b2c4882675c07d83dd9d6dc SHA-1: 58299dc04b664380f2196ce92f640cd8fea5de2b SHA-256: a9693d714f6a7c2ab278f11594be4a10a97a9d2e21f72298e2fe2ba3f3d3b011
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 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=rivertown+movie+theatre+grandville+mi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454665/normal_6031696332b82.pdfIn PDF document text
    • http://olipaka.xyz/sinikujses9i.pdfIn PDF document text
    • http://fituxem.sportsontheweb.net/who_is_the_killer_in_dark_season_3.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/zabijypn13.pdfIn PDF document text
    • http://gamedv.design/65176100886p2gu2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_5fd9d9be235d6.pdfIn PDF document text
    • http://euroshopmn.space/mee6_custom_commands_listfql5l.pdfIn PDF document text
    • http://ubzvp.com/diafragma_definicion_medica5l7im.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498842/normal_6000f6d4a72ac.pdfIn PDF document text
    • http://xovijezup.mywebcommunity.org/las_mujeres_que_aman_demasiado_in_english.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_a06e30553e384ee1b1ec7c0b997fd33f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nagev/gta_san_andreas_cheats_pc.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/sesipixipivoluseno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c0a6c9-2073-4113-be69-1ca22dae2f47/rawepibimoxolorobude.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/18647409785.pdfIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_d14b0adc0c904ceeac85e578b1f4e282.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8072f71a-bb1e-4cc8-95bc-e4e794770921/rugaputuzebumawopaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2972cd24-cbc5-4591-8b82-bdfe7a71d81e/kindle_fire_hd_7_3rd_generation_root.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/what_is_the_michigan_child_support_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/karl_jenkins_benedictus_cello_sheet_music.pdfIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_ec9a42803f684323b3b25a0e59b5e947.pdf?index=trueIn PDF document text
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_845adf3a66074e0c8b382b066f7afe95.pdf?index=trueIn PDF document text
    • http://ligoroxenafof.atwebpages.com/guitar_tabs_lick_it_up_kiss.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_off0000d606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD606 5220 bytes
SHA-256: 365c608fbcd477d8dad9101a071529eef386717cc1f5ca9cd1a9809983d2e830
font_01_sfnt_off0000e7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B0 10080 bytes
SHA-256: 84011c0aaacd1fe8689d7e4e33bd96969934872ec6becc0b0929030d46cd3e21

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