Malicious PDF — malware analysis report

Static analysis result for SHA-256 13ad3bcd49d48d9a…

MALICIOUS

PDF

84.1 KB Created: 2021-03-17 23:33:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c31cb5fa8562fa21928704dc5cceca0e SHA-1: 922acb4f039779fac6247a42e0d28294ae4bd14f SHA-256: 13ad3bcd49d48d9ada4ca4cf5445521d28341fe5039c708c032b15fa62f79c93
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 0.9993

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://midufefew.ru/aws?utm_term=garmin+echomap+plus+94sv+without+transducer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373522/normal_60035eb93d0be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501046/normal_5fcf6e66266c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451028/normal_604888950a175.pdfIn PDF document text
    • http://zeropium.com/linksys_extender_setup_ac1200_boost_ex29uqr.pdfIn PDF document text
    • http://car-den.ru/dujagim1w4y.pdfIn PDF document text
    • http://golixudib.mypressonline.com/ketolukulajated.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/bisection_method_mcq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_601693d6c60f7.pdfIn PDF document text
    • http://sikutamilom.iblogger.org/how_to_present_data_analysis.pdfIn PDF document text
    • http://kawofeme.iblogger.org/xenogears_deathblow_level_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_60521eb1e88eb.pdfIn PDF document text
    • http://santand-es.com/kobalt_tile_saw_reviewo1jx6.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/zibekomoyavkn.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/67311640184.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vubixijugisoloz.epizy.com/more_piya_video_song.pdfIn PDF document text
    • http://dobiloberororer.rf.gd/manual_j_load_calculation_free_software.pdfIn PDF document text
    • http://tubonunok.epizy.com/42523681180.pdfIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_e98b15b528c34a2b881c6de8bee0f72d.pdf?index=trueIn PDF document text
    • http://fetevatakipip.epizy.com/secondary_school_chemistry_book.pdfIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_22609eb9546a4f46a0a08668760b314b.pdf?index=trueIn PDF document text
    • http://roparewuna.rf.gd/giginesaziridoxa.pdfIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_86524d12bf6247f8908e97f72d29d6b4.pdf?index=trueIn PDF document text
    • http://kesinusaxaduveg.epizy.com/golelorilalim.pdfIn PDF document text
    • http://tirujukixiw.epizy.com/black_and_decker_cordless_hedge_trimmer_stopped_working.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_off0001064d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064D 5740 bytes
SHA-256: 9e168305a768d0a672ff8d927c91dc52a49ac3791e1420c7189210fddaf4ece9
font_01_sfnt_off000119c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C8 11672 bytes
SHA-256: e90d035125b962b2ffb10aa4f06cfafa95d66a7ffcfaf406488bfbc07283b7ac

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