Malicious PDF — malware analysis report

Static analysis result for SHA-256 926661baef35b678…

MALICIOUS

PDF

72.4 KB Created: 2021-03-31 11:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b2047b6504c416894efd7d92986a8b1a SHA-1: b89a31c33ad6f6d5c305c02264628c96e790c1f6 SHA-256: 926661baef35b6789a1f4a87967c0fa12c99e0f6b45de4030d55c86f174e8e0d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://soxebez.ru/wix?keyword=waxy+corn+seeds PDF link annotation
    • http://handler-autoscout24.com/mini_long_haired_dachshund_puppies_for_sale_near_mea96b2.pdfIn PDF document text
    • http://netewe8.xyz/zoneguboxefaboxadbnu62.pdfIn PDF document text
    • http://cesaregaspari.com/resumen_de_la_biblia_genesis_capitulo_18ihlj5.pdfIn PDF document text
    • http://legendnat.space/gowinevesovovolorupljv3i.pdfIn PDF document text
    • http://rastet-malysh.ru/what_size_battery_does_my_armitron_watch_takeo4dgp.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/learn_german_with_jenny.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450625/normal_5ffcfc642ca4b.pdfIn PDF document text
    • http://wowit.pro/jeforozeginotubexoncgy25.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/both_sides_now_ukulele.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372355/normal_5fe32e9355e50.pdfIn PDF document text
    • http://24goodstore.site/black_and_decker_thermoelectric_refrigerator_not_cooling49geh.pdfIn PDF document text
    • http://milky-rp.space/3265489544bwuhx.pdfIn PDF document text
    • http://redtea.space/bissell_proheat_2x_revolution_pet_pro_does_it_vacuumt4ul6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fafovinipola.epizy.com/77658283279.pdfIn PDF document text
    • http://tosurok.myartsonline.com/bootstrap_button_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d4d5b32-f397-4d1d-8bad-25363b723c75/31078173046.pdfIn PDF document text
    • http://vutogebufuz.myartsonline.com/lekuragalegobas.pdfIn PDF document text
    • http://gazinopalevigem.rf.gd/love_island_t_shirts_missguided.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64f76676-037f-4738-912d-200777b94793/redhead_gun_safe_accessories.pdfIn PDF document text
    • http://koguxegutoxexu.rf.gd/compact_oxford_thesaurus.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_off0000def6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF6 5084 bytes
SHA-256: bfd7d1626510496c4e866ce0f6fbd1ca91e8893736da37a747a3776164990e5e
font_01_sfnt_off0000f066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF066 10636 bytes
SHA-256: 786c726763be327413a0e08926faaf9dcba2b3783af3f5e52c6d83f2bf03c095

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