Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e6a756e35e04dd…

MALICIOUS

PDF

83.2 KB Created: 2021-03-02 20:04:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f00f2b1d164c931a5e86b791beb0c96d SHA-1: 3eecdc8bdea359ba70e01cdf5b29f32fab535769 SHA-256: 59e6a756e35e04ddaed091b460548fa04ea4aa82ad5a6bad4714bdea5e612d80
64 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to direct users to potentially malicious external content, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9758

Heuristics 3

  • 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://soxebez.ru/award?keyword=second+order+derivative+important+questions PDF link annotation
    • http://hotsales-com.xyz/options_trading_strategies_for_dummiesknmi9.pdfIn PDF document text
    • http://realnoe-obshenie.online/illustrated_guide_to_the_national_electrical_code_7th_edition_answer_keysiuw2.pdfIn PDF document text
    • http://myimperfectmomlife.com/where_can_i_buy_kenmore_stove_partsbrgiu.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/larepupuvogalu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406228/normal_5fd1cff656325.pdfIn PDF document text
    • http://axacheat4.xyz/us_online_apparel_shoppingqr092.pdfIn PDF document text
    • http://copyrightproblem.com/mines_of_mars_boss_guideuzrpb.pdfIn PDF document text
    • http://g2am2e.xyz/entender_la_arquitectura_leland_rothgt908.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/honeywell_vision_pro_8000_thermostat_wiring.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369773/normal_5fe22aec76b16.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/apc_smt1500nc_smart-ups_1500va_lcd_120v_with_network_card.pdfIn PDF document text
    • http://shopee24.site/63617011723u8cc6.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/spanning_tree_protocol_stp_default_behavior.pdfIn PDF document text
    • http://ighelpcenter.xyz/what_does_self_knowledge_meanbazpe.pdfIn PDF document text
    • http://copyrighytsupport.com/pride_and_prejudice_2005_dialogue_scripthtqw2.pdfIn PDF document text
    • http://senteber.site/what_percentage_of_transgender_regret_surgery1ty1j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410462/normal_602c12ce0c969.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tedowafomaru/kajuvilifasoxiraman.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/negaxeniditupokix.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FE 5360 bytes
SHA-256: e0d28b2eda7ab673f6385137e6a25aa6262d863d8560f991418adff09520df29
font_01_sfnt_off0000f60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60D 15048 bytes
SHA-256: 191ba231fc1f53f7419c38e71cdf370dfce235efcac8c59db7dd64e806ed59ec
font_02_sfnt_off00012576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12576 16076 bytes
SHA-256: c33faafd911d2c4e8fea0807a017527063dea1be9a25b30e85ccf6f7667e82b6
font_03_sfnt_off00013a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A1D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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