Malicious PDF — malware analysis report

Static analysis result for SHA-256 e99cc5a1cebf8511…

MALICIOUS

PDF

88.6 KB Created: 2021-02-25 23:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9967ceec46d7f92ff91bba136dca6e15 SHA-1: eba250d4d0f53b7a13af7df1175deda040907cd2 SHA-256: e99cc5a1cebf851187ef1d8f1eb62cfce7b8df36a11f416a4d15bbfc5c42337f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

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 0.7084

Heuristics 4

  • 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
  • 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://baarspo.ru/award?keyword=quran+with+urdu+translation+mp3+download+zip PDF link annotation
    • http://forsage.pw/76617911965qg3cd.pdfIn PDF document text
    • http://myfirstsite.xyz/44533540463kch54.pdfIn PDF document text
    • http://myyshooop224.site/como_hacer_un_proyecto_de_investigacinw9c9k.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/what_is_the_difference_between_dewalt_and_dewalt_xr.pdfIn PDF document text
    • http://rutefozur.22web.org/wave_interference_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/iijbif7/june_s_journey_hidden_objects_app_store.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/jafawixixopegapibefikejuv.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/palepinovumetod.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/hfzjjg8/history_channel_vault_promo_code.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/ghdYeij/247_discount_code.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/28302218829.pdfIn PDF document text
    • https://cdn.sqhk.co/wikelere/fjhvgiW/online_general_knowledge_quiz_with_answers_pakistan.pdfIn PDF document text
    • http://tumbaa.space/73985889926k7ap3.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/idNohc9/2961063159.pdfIn PDF document text
    • http://cherrypimp.online/windows_server_2012_foundation_download9aypt.pdfIn PDF document text
    • http://musofiron.ru/90440326448z4s7n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zerakunutage.epizy.com/ajooba_songs._pk_free.pdfIn PDF document text
    • http://kujazidi.epizy.com/infectious_disease_treatment_guidelines.pdfIn PDF document text
    • http://xolemobubusosi.rf.gd/93095770339.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00014a7e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14A7E 11264 bytes
SHA-256: b24b20d2e6de53438f530415050c739a1a50dfe6809598e5f6e74dbcc9ff995d
font_00_sfnt_off00011474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11474 5564 bytes
SHA-256: 5dfe3f8aa227db76b66c0749fdefb7a015bfeeca8a1f2fa32f551ccc8c79de96
font_01_sfnt_off00012749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12749 10268 bytes
SHA-256: b940f5cedd2401dc209ca998456477b0d7151a1a66db91dd45476518795b8f58

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