Malicious PDF — malware analysis report

Static analysis result for SHA-256 3475bf12e81f4a11…

MALICIOUS

PDF

72.2 KB Created: 2021-03-14 10:00:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9616ac3d76b009c3a0e1196dc637ba81 SHA-1: e8fa84eed2492d043c649c8296dae9c53886eea4 SHA-256: 3475bf12e81f4a11f6e2faede67c6cb05f465c32ac0a09c767c9be4480b5218a
126 Risk Score

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 0.9990

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/wix?keyword=probability+theory+worksheet+2 PDF link annotation
    • https://cdn.sqhk.co/kisesawaropo/HhjhhXr/cinemark_theater_monaca_pa_showtimes.pdfIn PDF document text
    • https://cdn.sqhk.co/majumoros/cOkTiaA/block_fortress_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/twhbghU/highway_truck_racing_endless_truck_driving_games_free.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/toyota_camry_xse_for_sale_2018.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/vepogonopafegone.pdfIn PDF document text
    • http://pumorux.medianewsonline.com/80457302542.pdfIn PDF document text
    • https://cdn.sqhk.co/texafikogot/ieiiMHh/niwinijim.pdfIn PDF document text
    • http://gudutisiluzew.mypressonline.com/kefupa.pdfIn PDF document text
    • https://cdn.sqhk.co/rapekerokemo/f7Rjdhj/23792353823.pdfIn PDF document text
    • https://cdn.sqhk.co/vemegunir/lmijjeL/68560025107.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/fWjMiI8/4842446691.pdfIn PDF document text
    • https://cdn.sqhk.co/tokofape/NejejiM/are_iguanas_friendly_to_humans.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/ibighhK/23538697481.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/jiiiyhe/40040097465.pdfIn PDF document text
    • https://cdn.sqhk.co/tupujokuz/Xgh3Ugi/past_present_or_future_tense_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/fenajobuwer/hcauf4m/monkey_preschool_lunchbox_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/xQha5gi/titan_quest_ps4_controls.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
    • http://vilumepidiwego.myartsonline.com/rukajexamivirimixu.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/audio-technica_at-lp60xusb_edifier_r1280db_turntable_package.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b4e3c41-a082-4484-9bb4-f77e7ee19ccc/leforitex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59ddcefe-c8bf-4fe3-a416-20f9dcd993de/baba_ramdev_yoga_book_free_download_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/190afb20-00ca-4f1c-8915-d4aff84d2b2f/jolililotanabezo.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/mipizobigaxomipeduveki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29375e7f-ec98-4156-ade6-7b1930f3b026/sizeditajaxuzogipo.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/14663956347.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_off0000d0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F8 4984 bytes
SHA-256: ded728b06e5c5de1806edc422e662bde4671e1064f6fdeb1864e33df5fcdaada
font_01_sfnt_off0000e207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE207 9736 bytes
SHA-256: 18bca0fe73215e57f70f40e7f218a0ef8d5b0698c0f431f5416e628fef6ed084
font_02_sfnt_off0001035e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3