Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b193e9367977754…

MALICIOUS

PDF

87.2 KB Created: 2021-04-13 04:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 45a1d18418520c0ebb9bc3419c724f6b SHA-1: b728075a41d7bcf6e49e4b1f7454f4e625d4e5b2 SHA-256: 7b193e9367977754a02328bee18d5d1f75f6b129467fe6ae3f6bc2e85608d2c4
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains keywords like 'taoism' and 'wkhtmltopdf', likely intended to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=what+is+unique+about+taoism PDF link annotation
    • http://levelupguild.com/19440251182uy0pd.pdfIn PDF document text
    • https://cdn.sqhk.co/dofofigeniso/LgeVjfW/castle_jungle_world_run_3_mod_apk_download.pdfIn PDF document text
    • http://checkmycredit.info/best_international_finance_jobsfau4d.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/htgdgjy/chicken_drumstick_template.pdfIn PDF document text
    • https://cdn.sqhk.co/doboketuzoj/gdhm2gj/dudoludoguz.pdfIn PDF document text
    • http://minosijasif.mypressonline.com/93468487710.pdfIn PDF document text
    • http://bekulosokoj.iblogger.org/pizenajutofexu.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/xxic9if/35657055433.pdfIn PDF document text
    • http://ita-talia.fun/how_to_connect_jbl_flip_2_to_iphonenlhzp.pdfIn PDF document text
    • http://jepisafidezegun.scienceontheweb.net/dezusamomuxejinafodikorit.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/learn_autocad_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/wabogojo/geI3Oic/love_story_book_cover.pdfIn PDF document text
    • http://xidasetetobuge.scienceontheweb.net/80236147638.pdfIn PDF document text
    • http://lidagejelotodu.22web.org/granite_peak_montana_guides.pdfIn PDF document text
    • http://bijukexamova.scienceontheweb.net/apartment_ownership_law.pdfIn PDF document text
    • http://xolokeminapi.getenjoyment.net/denawiwavewidasozafameda.pdfIn PDF document text
    • http://delinapod.mypressonline.com/disneyland_paris_walt_disney_studios_map.pdfIn PDF document text
    • http://suguxilaxiz.22web.org/91107759753.pdfIn PDF document text
    • http://fruitslope.online/what_is_the_main_theme_of_hansel_and_gretelf4k01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fapiranug.epizy.com/jopinupegidubilonu.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/jajusudamezawitamamiwigof.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/aerodrome_manual_meaning.pdfIn PDF document text
    • http://nupuzawov.onlinewebshop.net/88601469741.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/giborixaxumon.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/41757380481.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_off00010676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10676 5072 bytes
SHA-256: d9fa6d6ef0bc0ea4f5baab2a22144357f9a476c519621c503754d309742a11e7
font_01_sfnt_off0001181c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181C 5076 bytes
SHA-256: d960ddd6828f527cdc3993b66bab33a7331299b16b5044d34583cc5c9af72d5b
font_02_sfnt_off0001294b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294B 11308 bytes
SHA-256: 5ae2847802912e711a9f919666e0f7e1e766b84833b081347884739b2e3e7779

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