Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d755f03dd6d5f9…

MALICIOUS

PDF

79.4 KB Created: 2021-04-04 08:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2e35abc933f4f913676f1e21627fa0d4 SHA-1: ef96d89a280ad38ddcfcc2c8230a882df8938d47 SHA-256: c5d755f03dd6d5f9c82587893987248c4d8524a317a9a49fe1845fe1c8bc7eb6
126 Risk Score

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://seumenha.ru/wix?keyword=rockport+reservoir+fishing+spots PDF link annotation
    • http://xexejevun.medianewsonline.com/change_in_bengal_agrarian_society.pdfIn PDF document text
    • https://cdn.sqhk.co/towafeniruje/ehdhgJI/revolico_motos_electricas_holguin.pdfIn PDF document text
    • https://cdn.sqhk.co/fosuzonarefi/6Shdw7T/nesugumusodipazowig.pdfIn PDF document text
    • http://vitetoka.scienceontheweb.net/madusitevejugejuv.pdfIn PDF document text
    • http://lurubalopare.sportsontheweb.net/network_marketing_ebooks.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/fn2qiek/game_sidhu_moose_wala_ringtone_download_djpunjab.pdfIn PDF document text
    • http://nigemutekilum.mypressonline.com/british_slang_dictionary.pdfIn PDF document text
    • https://cdn.sqhk.co/luwonopilil/cdihUye/4._4_biomes_answers.pdfIn PDF document text
    • http://xizerunax.scienceontheweb.net/ethiopia_bilateral_investment_treaties.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/laginekux/report_injured_bird_melbourne.pdfIn PDF document text
    • https://71347f20-8353-4153-bebc-dd2a28b3a5cf.filesusr.com/ugd/a382ee_96cb5ce5b44b4c529d3581151c689366.pdf?index=trueIn PDF document text
    • http://gikisomu.epizy.com/ielts_academic_writing_samples_with_answers.pdfIn PDF document text
    • http://memamawu.onlinewebshop.net/gezixepunowojimowewimitom.pdfIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_9010ee7808e2481692cc72ef22ded834.pdf?index=trueIn PDF document text
    • http://zotikatisi.rf.gd/bodidagojagidafurupix.pdfIn PDF document text
    • http://kakoxoduruze.epizy.com/bus_simulator_indonesia_pc_game_free_download_windows_10.pdfIn PDF document text
    • http://lugimeviguv.myartsonline.com/revolizam.pdfIn PDF document text
    • http://fuzimobikuxuta.epizy.com/jupogeruwegepexenifo.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/66446144446.pdfIn PDF document text
    • http://piwugolixero.epizy.com/53177708872.pdfIn PDF document text
    • https://2cc3dcad-61c1-4442-8662-ca5be7cd8672.filesusr.com/ugd/71b93f_41c77ee393674a2397614be1f9b91e76.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/car_air_con_repairs_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/zuluribox.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_off0000f7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C5 5164 bytes
SHA-256: a58935c2059af64539854f0697776c487b0d410a45e00feb75db8df29555bc6b
font_01_sfnt_off0001096e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096E 11460 bytes
SHA-256: 408cb82dbb1e33e53d8842538b73ea2acc90a965ae5b1f9f4cae04f48de564f4

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