Malicious PDF — malware analysis report

Static analysis result for SHA-256 8959e3996e3e2821…

MALICIOUS

PDF

78.4 KB Created: 2021-02-27 07:36:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1e58707fa14d384f7a192fa8b4339a0d SHA-1: d8d30b69fc5d26b84c38ad4373d67892fefe3c66 SHA-256: 8959e3996e3e2821e83df87dc6746cfb0b78172a5272dccca803fcdcae4b6c8f
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9998

Heuristics 4

  • 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://lozipotod.ru/strik?utm_term=what+is+living+water+according+to+the+bible PDF link annotation
    • https://majojolug.weebly.com/uploads/1/3/4/5/134595566/nojujutizab.pdfIn PDF document text
    • http://sajuvavosi.22web.org/travel_trailer_furnace_motor_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_6034c21cc7b00.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/wiporanosumepojoboge.pdfIn PDF document text
    • https://petivevidimow.weebly.com/uploads/1/3/0/8/130813859/kowizib.pdfIn PDF document text
    • http://leopards.space/loan_interest_calculator_excel_sheet7xgvk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390330/normal_6007ea0515776.pdfIn PDF document text
    • http://alania365.ru/goginuvawojaamgr5.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/1007237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426072/normal_601aa0db5ebf2.pdfIn PDF document text
    • http://neo-tp.ru/pebuxonukadowr1fp.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/how_to_reset_vivint_panel_frozen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392661/normal_6027e8e16eed2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://judiserod.onlinewebshop.net/13901208212.pdfIn PDF document text
    • http://sosefaxerutujax.rf.gd/pisatadixiwopavoza.pdfIn PDF document text
    • http://mewuxugeje.epizy.com/punctuated_equilibrium_model_of_evolution_with_the_gradualism.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/damen_fanart_captive_prince.pdfIn PDF document text
    • http://tinasixubu.epizy.com/gimojevubetevevejaxuwijen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98F 3384 bytes
SHA-256: 6f34e3d801991ad396d67bba56c4cbee6b0cca5ebe6734bc1dc00e19d120a384
font_01_sfnt_off0000f5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B0 5504 bytes
SHA-256: f89c553bd8e7870a4a8ad01fa73dba465fd2352890ead82c9d8566f4bc6bd849
font_02_sfnt_off00010879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10879 10328 bytes
SHA-256: 8fed48066e07d4abf17dff4bdbd79224b7152b0ea3759def53010d15f1d1a0ef

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