Malicious PDF — malware analysis report

Static analysis result for SHA-256 9006fafe13d68842…

MALICIOUS

PDF

78.3 KB Created: 2021-04-07 20:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c935dfc7c54f10afc254d88432f9f9ad SHA-1: 36525358b5f71d2245f2551af1a99aca83075391 SHA-256: 9006fafe13d68842fbd8a0eeff11692218d9f4f851e7162522cae79773fb608e
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 0.9992

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://maypoin.ru/123?utm_term=best+android+podcast+app+2019+uk PDF link annotation
    • http://bcpzonasegura10beta-viabcp.com/the_disaster_artist_filmtv06vhk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426415/normal_60527d515b627.pdfIn PDF document text
    • http://mastericy-chistoty.ru/31948027324o24w6.pdfIn PDF document text
    • http://yatvoyya.fun/velineon_vxl-3s_specsccpv5.pdfIn PDF document text
    • http://greyfruit.space/tanafumafixadesosetotadq45tg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468261/normal_60522e33899b8.pdfIn PDF document text
    • http://new-volosi.ru/how_to_increase_lockpicking_wowt6c3r.pdfIn PDF document text
    • http://energytik.net/rotilodomibubabagutosidjx35j.pdfIn PDF document text
    • http://sluzhba1.net/what_qualifies_as_a_short_term_disabilityholp7.pdfIn PDF document text
    • http://claire-irk.ru/is_infrared_heater_good_for_health8ykpj.pdfIn PDF document text
    • http://sdfafq.info/irulu_tablet_expro_x1_factory_reset3m9wy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367279/normal_5fec1da2264a9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f33c6e5c-7df4-4e41-a922-fad4d8e39104/how_to_fix_my_wahl_clippers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66c95b1f-e63c-4180-b587-b0012b05a948/modern_chemistry_workbook_answers.pdfIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_6919f29083d54c39a3692dd21080fb7c.pdf?index=trueIn PDF document text
    • http://xisewidudulad.rf.gd/sisesodenefise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d62c9577-4158-4238-bb45-f783466b3316/straight_talk_phone_hotspot_stopped_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb458ab3-9780-4532-8368-21d538256be6/kulurunefulepage.pdfIn PDF document text
    • http://dawifugoxumevej.rf.gd/gotta_go_my_own_way_piano_sheet_music.pdfIn PDF document text
    • http://jawegoxizifiti.epizy.com/android_update_sqlite_database_example.pdfIn PDF document text
    • https://a208a2de-cee2-48c2-86e3-c620a022946d.filesusr.com/ugd/dda32d_f0093cb1d27242adacf3ee08f88c79eb.pdf?index=trueIn PDF document text
    • https://6ce95562-7558-49ee-a7b0-b3003db3b0e9.filesusr.com/ugd/d13e1f_bc89f073d5f549969a22e7d02613227d.pdf?index=trueIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_b7ffa27c2b0747198c2c2ff138a3288d.pdf?index=trueIn PDF document text
    • http://bosurigazo.epizy.com/technical_writing_certificate_programs_massachusetts.pdfIn PDF document text
    • http://luviwozota.rf.gd/is_there_a_final_fantasy_16.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_off0000f3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A6 5628 bytes
SHA-256: 561d06f74e3072f4d56a1baf60351536286e31a366f309b4cb638870a3fc2cd9
font_01_sfnt_off000106e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E7 10860 bytes
SHA-256: 3605384258753a2da5db2dbb82c9650da3025753a92146124963e4006914fbf9

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