Malicious PDF — malware analysis report

Static analysis result for SHA-256 366be8a6696825c7…

MALICIOUS

PDF

74.2 KB Created: 2021-04-03 23:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 9b8f78f79e98c30fad3749165eb2c9e8 SHA-1: 34dd9051195f64aae65c6f3274b87d246367259c SHA-256: 366be8a6696825c7499e440ef42a742c9d4406fa8803b1278542e50e7ab1b0d0
134 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The presence of a 'download' button heuristic further supports this, indicating a lure to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/123?utm_term=canon+ir+toolbox+4.+9+software PDF link annotation
    • https://cdn.sqhk.co/kopilixa/jchbhho/10253705612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453747/normal_601725849d460.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/jgLgfha/voice_assistant_application_market.pdfIn PDF document text
    • https://bilagezapa.weebly.com/uploads/1/3/1/1/131163658/902d4949c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417990/normal_5fddd2dd15745.pdfIn PDF document text
    • https://cdn.sqhk.co/konajera/iFhiifw/game_of_thrones_main_characters_season_8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_60322a82e97fb.pdfIn PDF document text
    • https://linepapimufuto.weebly.com/uploads/1/3/1/6/131637640/145ce9b6ee7ee.pdfIn PDF document text
    • https://cdn.sqhk.co/podadoxafa/ScaD9J3/coloring_coloring_pages_to_print_for_adults.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fab88ded-2f12-46c9-b6ec-f290036286cc.filesusr.com/ugd/cce69c_490f7e30a41641b59f10a0d136a9b0f6.pdf?index=trueIn PDF document text
    • http://kepewitibafef.myartsonline.com/fenazewunufurasafavan.pdfIn PDF document text
    • http://bitines.myartsonline.com/adverb_of_manner_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9e45366-b1d5-498d-8da8-7a098e423e66/12706496707.pdfIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_5bbc905dccb6417894c0e436a654f8b3.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_6981c6f899c846e5af473a53276e8380.pdf?index=trueIn PDF document text
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_927bbebc983742968790158130d164f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/59dde5fa-a834-472f-81c6-3db161e659cb/bluedio_turbine_bluetooth_headphones_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73775598-e8c0-46c9-8cb9-4c6e64cb93df/taco_bell_black_bean_burrito_calories.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_off0000e6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BD 5244 bytes
SHA-256: 415b46dd4ee485663c01c08f51145c48bcd31e93e32db5f925ea7bebef7f8714
font_01_sfnt_off0000f8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BC 10200 bytes
SHA-256: dca66a5ea807c924b24667b01ee51754453c8c6f9b20ed42e594bdd9d8ec9470

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