Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f7af72a0086aa3…

MALICIOUS

PDF

78.4 KB Created: 2021-05-16 11:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 24fc0479a488f2cd792cbfc1fd22136f SHA-1: 80598c2b3ca69ed19f135358fc7debbc7af80936 SHA-256: 29f7af72a0086aa39b2772c544bc47412dadaa896aa73606c40c81ed01c3aa66
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 0.9996

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://nipisod.ru/strik?utm_term=how+to+put+together+coleman+hot+tub PDF link annotation
    • http://gumidaz.medianewsonline.com/civic_engagement_definition.pdfIn PDF document text
    • http://xunarepozufuz.mygamesonline.org/can_someone_see_my_browsing_history_from_another_computer.pdfIn PDF document text
    • https://cdn.sqhk.co/lojewewure/5jbjeie/descargar_juego_purble_place_para_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/yDhcmgh/nolajalarinifadituzinijot.pdfIn PDF document text
    • http://vapokox.22web.org/41310181673.pdfIn PDF document text
    • http://nalipuderasifo.iblogger.org/small_business_plan_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/hahg1FI/95659925635.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/uw8ChaB/moturanidabin.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/oEgjhdN/best_simple_to_do_list_app_for_iphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baruluzibovog.epizy.com/tajuf.pdfIn PDF document text
    • http://genufewewirim.rf.gd/jax_twisted_treeline_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/dynamics_management_reporter_versions.pdfIn PDF document text
    • https://383fd46b-cc41-47b7-9379-19c19d7bb1fe.filesusr.com/ugd/81c43a_0ed1148d9afd4cab8b501ee181425fb3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/82089291551.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/sentencia_amparo_indirecto_formato.pdfIn PDF document text
    • http://fewuxujijafefif.epizy.com/cantina_band_star_wars_piano.pdfIn PDF document text
    • https://dd907c4b-492b-4b4d-bf3c-9f0b7a2bd2c7.filesusr.com/ugd/96a426_f498a073ed2a4108a00533050f103600.pdf?index=trueIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_3b0347ff9ef244d3ac9806f102480303.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gumagabu/1-99_crafting_calculator.pdfIn PDF document text
    • https://527ed197-5826-4432-9c89-449afa9d705e.filesusr.com/ugd/65ef70_32e7c7e0c74a4f7e80cc69ff54a7e314.pdf?index=trueIn PDF document text
    • http://bomepexajusopa.epizy.com/87333572335.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_off0000f2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BE 5364 bytes
SHA-256: 93998b075e72a71753f1cb6a6347eb033560750a22a6e39bd52bec3df16a4ddc
font_01_sfnt_off000104e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E0 11556 bytes
SHA-256: 790500da2255297998fe4d9403fb5844ad51347153fe5053c39ad0662903430f

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