Malicious PDF — malware analysis report

Static analysis result for SHA-256 325bd862dd067e87…

MALICIOUS

PDF

69.4 KB Created: 2021-05-08 20:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ed6e945e56cdf8ebe84c75b86eaac766 SHA-1: d8c782ea94f5b319fb6ac734cfa793c814cbdc5e SHA-256: 325bd862dd067e87b3dfc5cc4af3f9537e1d219a971b05df4219882bdcafc4e1
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 0.9992

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://soxebez.ru/strik?utm_term=acer+s230hl+monitor+manual PDF link annotation
    • https://cdn.sqhk.co/seduregudire/sjcghhi/oregon_state_durable_power_of_attorney_form.pdfIn PDF document text
    • http://kelimap.mywebcommunity.org/wadetasinipoxewoxikikar.pdfIn PDF document text
    • https://webesetumisurut.weebly.com/uploads/1/3/4/3/134318687/vetesawenazo.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/fozojunodazetewutuva.pdfIn PDF document text
    • http://tupakewufitid.iblogger.org/nazasisomawokeromunuwaram.pdfIn PDF document text
    • https://cdn.sqhk.co/jorobasobu/ZyRceqE/lisose.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/sapadaw.pdfIn PDF document text
    • https://cdn.sqhk.co/nuponoviva/wLiiQC5/27245542402.pdfIn PDF document text
    • http://rivokalodusi.sportsontheweb.net/astrophysics_books_for_undergraduates.pdfIn PDF document text
    • http://limevekobo.iblogger.org/pokemon_red_walkthrough.pdfIn PDF document text
    • http://suwufexez.sportsontheweb.net/came_to_believe_online_free.pdfIn PDF document text
    • https://nopuxexej.weebly.com/uploads/1/3/4/4/134498230/51bc48.pdfIn PDF document text
    • http://kajipim.mypressonline.com/kidde_kn-cob-b-ls_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/6jbatM7/transport_tycoon_fivem_hack.pdfIn PDF document text
    • https://matuwulivusoxuk.weebly.com/uploads/1/3/4/8/134897084/reridarexoz_wafegenotikoro.pdfIn PDF document text
    • https://cdn.sqhk.co/xizemeginu/pAT8jej/cdna_library_construction_steps.pdfIn PDF document text
    • https://tulorikuxefuwi.weebly.com/uploads/1/3/4/7/134730127/juzazixa.pdfIn PDF document text
    • http://fatokopos.22web.org/accounting_cycle_worksheet_example.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jovozovoxisuno.epizy.com/tung_acupuncture.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/80160428077.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/30460690905.pdfIn PDF document text
    • http://punefururoxifep.epizy.com/mikixinekoputoraf.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/rumixa.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/52582599667.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/36079148868.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_off0000d16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16B 5468 bytes
SHA-256: 54eae0914cc77c137a69a5a2639841daabe65e659bc67f65940e1a08a871a03d
font_01_sfnt_off0000e3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D2 10140 bytes
SHA-256: 13b9d469589836da85581e16095ff6365614062d33aa19820ba46bade5a80685

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