Malicious PDF — malware analysis report

Static analysis result for SHA-256 42fd60d1ca965dd8…

MALICIOUS

PDF

95.1 KB Created: 2021-03-30 13:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c445b752f5e8b855b45b7a29ea67412c SHA-1: 497a0149d6759d931bd4d62680436bb751ef6c71 SHA-256: 42fd60d1ca965dd8c88aad95dd652c706154e69446d22176fbfa5e223483d0d3
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/award?keyword=brahmanda+purana+pdf+free+download PDF link annotation
    • http://fasodotujane.iblogger.org/macbeth_act_1_scene_1_analysis.pdfIn PDF document text
    • http://fb-copyright-help-from.com/how_do_computers_work_for_dummies91web.pdfIn PDF document text
    • https://cdn.sqhk.co/moromasi/Pihjdid/dajevariroxagadaso.pdfIn PDF document text
    • http://zilixijabukepul.iblogger.org/51575180760.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/30034800154.pdfIn PDF document text
    • https://cdn.sqhk.co/lojadisexudo/fgeOjet/65196651974.pdfIn PDF document text
    • https://cdn.sqhk.co/bozadukopufu/YjaBTyA/free_online_to_do_list_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/bFVNUij/all_in_one_game_offline_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubokave/cejgkAt/banud.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/68993651471.pdfIn PDF document text
    • http://manthoughtswebsite.website/4253816935758pp8.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/AuZZgjL/draughts_definition_and_examples.pdfIn PDF document text
    • http://kopumiwabetare.66ghz.com/dell_p2417h_spec_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/hHhoghz/xosesesopaf.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/bushmaster_pre_ban_serial_numbersy78pg.pdfIn PDF document text
    • http://migerov.xyz/8569306090413daw.pdfIn PDF document text
    • http://blacktea.space/500_days_of_summer_full_movie_hindi_dubbed_watch_onlinehx08w.pdfIn PDF document text
    • http://rasazajafatirek.mypressonline.com/eric_ambler_books.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_f734d10a125d4c81a4bdd4b6fec23654.pdf?index=trueIn PDF document text
    • https://949217f6-ecfc-4a1b-8806-967b2a145102.filesusr.com/ugd/b08fd2_6b08582684c242e08dfd8d2f9059cdc6.pdf?index=trueIn PDF document text
    • http://gevejonitu.onlinewebshop.net/damen_fanart_captive_prince.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/red_a_crayons_story_worksheet.pdfIn PDF document text
    • https://2ad55d82-15d9-4995-b72c-f03dca93b5f4.filesusr.com/ugd/11b7eb_0f14da562fe24dc89c23dc11b2dfc2bf.pdf?index=trueIn PDF document text
    • https://09d7e2b9-79a3-4876-9e00-73a1ba4263a4.filesusr.com/ugd/92fcd7_ae17d44ef3d242ddb561f2dfc56453d3.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E0 5244 bytes
SHA-256: 393cf2ffce72ac405fe19c4b33389a70479e9e62c4f4a14213354e33547e69a1
font_01_sfnt_off0001169d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169D 5672 bytes
SHA-256: d9c08756e10ed0bd40db0ffe466fba24a18155ab9a3e74848dfd8038a0986d16
font_02_sfnt_off000129a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A7 12252 bytes
SHA-256: df2258d9a9d6076057ad617dd8f879d989ba1e2d1cdbde5ff5b2aaae56d297af
font_03_sfnt_off0001527b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1527B 7760 bytes
SHA-256: 2f26d5a922c0184b4ef88f1ff0af23c4340f771721fb910f52f9d2c369e18e05