Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a1da0376d01b06b…

MALICIOUS

PDF

78.9 KB Created: 2021-03-13 23:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: bfccf03ca5d447bde028636e6409e36b SHA-1: 8b8c8a14ea5590813a3790d7404005f94a4c4ef4 SHA-256: 8a1da0376d01b06bfdfa8d51c9b4536ae68285c895ce9fd4c9ceb8d57288e969
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, many pointing to disposable hosting and link farms, suggesting a tactic to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to 'reported cases of zika in bahamas', likely a lure to entice users to click on the embedded malicious links.

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://botokaw.ru/123?utm_term=reported+cases+of+zika+in+bahamas PDF link annotation
    • https://cdn.sqhk.co/pafevola/RU8Bghd/college_application_resume_template_word.pdfIn PDF document text
    • http://bokifov.iblogger.org/angry_bird_star_wars_apk_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/h7fdB9M/82602706572.pdfIn PDF document text
    • http://itfamily.info/dusuxepubofabapeidozd.pdfIn PDF document text
    • http://kulovemalam.22web.org/95362284.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/9909448038.pdfIn PDF document text
    • http://1xbet-registrat.site/duraflame_1500_watt_infrared_heater_reviewswokuy.pdfIn PDF document text
    • http://fuxanujibiz.mygamesonline.org/19239578924.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/iqhbBTg/war_of_conquest_canada.pdfIn PDF document text
    • http://shopyou.online/resumen_corto_del_mundo_de_sofia_pelicula3figw.pdfIn PDF document text
    • http://wijofotezopadik.medianewsonline.com/peluzurazogoxobomer.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/SIiitmK/27380960761.pdfIn PDF document text
    • http://euroshopme.site/579296210905594n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://maxupalilapudot.rf.gd/48222862524.pdfIn PDF document text
    • http://zugepoguj.onlinewebshop.net/watch_doctor_zhivago_1965_online_free.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_aec39f49217f440f9836728c0b55ca61.pdf?index=trueIn PDF document text
    • http://tukutuxobolekub.epizy.com/21565507606.pdfIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_4acaaad3eec343f8b2a96b45939ade88.pdf?index=trueIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_99f57997e7574cecaa1592125b9338b6.pdf?index=trueIn PDF document text
    • http://koduwutuvage.onlinewebshop.net/how_to_adjust_stride_on_fitbit_charge_2.pdfIn PDF document text
    • http://xedonufil.rf.gd/beltone_hearing_aid_app_for_android.pdfIn PDF document text
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_35859f52004f4d4d886c6182362a549a.pdf?index=trueIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_ab0350a887b746fcaa8b09c072de0d30.pdf?index=trueIn 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_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 5624 bytes
SHA-256: 3d9ac1385163ab4fa884e56a67f5ac2908f62199538d644ca3131c0622d465a3
font_01_sfnt_off000104fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FB 11804 bytes
SHA-256: 3594f1e80180220641a0be8fed23acd20c7dba4f5bbcfb46249153532713cad0

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