Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d8a9853fe9e9af…

MALICIOUS

PDF

71.0 KB Created: 2021-03-30 23:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: db34811292ccf915867b1402b04c262c SHA-1: 0eb36c9a30fcee66c1851bb54f23a8b9b6bc8aa1 SHA-256: 06d8a9853fe9e9af73b2278716e7082f6ce7e6cc3f83320efc0a144044aa08e5
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 0.9993

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://xajibur.ru/wix?keyword=forensics.rice.edu+case+5+answers PDF link annotation
    • http://desokore.medianewsonline.com/probability_problems_with_answers.pdfIn PDF document text
    • http://zitukuwekoba.sportsontheweb.net/lasasekomevepabamofo.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/samsung_galaxy_s9_plus_size.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/matematicas_financieras_alfredo_diaz_mata_gratis.pdfIn PDF document text
    • http://molufipet.sportsontheweb.net/james_a_o_brien_management_information_systems.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/56162701445.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/price_action_scalping_download.pdfIn PDF document text
    • http://fesufobototezer.mywebcommunity.org/bupoz.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/ficha_biopsicosocial_primaria.pdfIn PDF document text
    • http://forensics.rice.edIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://widepidaba.atwebpages.com/46716831131.pdfIn PDF document text
    • http://xijewixevav.onlinewebshop.net/why_is_my_lorex_system_beeping.pdfIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_dc1f8043617d4a80a3dc5a6835d7dd90.pdf?index=trueIn PDF document text
    • http://pekiluji.atwebpages.com/possessivpronomen_im_nominativ_bungen.pdfIn PDF document text
    • https://8ea4a4fb-2859-49e6-8c89-66ed49166bb4.filesusr.com/ugd/0088c1_36b060d95acd4d568fa1d86fb6ac8675.pdf?index=trueIn PDF document text
    • http://mobukug.myartsonline.com/vatoxuwosupoloxu.pdfIn PDF document text
    • https://54a0e2cb-796f-4f80-9aaf-d11633176b06.filesusr.com/ugd/b0c554_c0fe73e142704c7d9e486e1bb5485704.pdf?index=trueIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_13f8e5ccd58548e8a89fec19df971dc2.pdf?index=trueIn PDF document text
    • http://bolapapuziku.epizy.com/transformers_animated_series_online.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/women_of_the_bible.pdfIn PDF document text
    • http://zurademo.epizy.com/pokevuxiri.pdfIn PDF document text
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_4635a4557ade42b7ae7f92192e0daa33.pdf?index=trueIn PDF document text
    • http://xurosuforudev.atwebpages.com/biology_questions_for_rrb_ntpc.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/panuje.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_off0000dae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE2 5104 bytes
SHA-256: b89a8e488b27b76b7927d422e8f04ab42b504ba40a4d4fdac58aff70af501bf1
font_01_sfnt_off0000ec6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6B 10072 bytes
SHA-256: a2d8a07a9d662c7ef73fd8dcb1c37105530585816b9689b5220a637de9c9c946

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