Malicious PDF — malware analysis report

Static analysis result for SHA-256 7994ed235ad4903e…

MALICIOUS

PDF

74.7 KB Created: 2021-03-05 07:54:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3890b353ce3f700e06c0b36ffac28417 SHA-1: 5550b26ff9480721627b26a6f15b210d3b0a8f69 SHA-256: 7994ed235ad4903e660bacb0958003346fb24984ba8f1bc22889cf7dfa5f1a74
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 0.9993

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://bologen.ru/wix?keyword=macroeconomics+paul+krugman+4th+edition+answers PDF link annotation
    • http://kunozoxutokusu.mygamesonline.org/1089343112.pdfIn PDF document text
    • http://bomepufibawil.scienceontheweb.net/hp_5510_printer_cartridge_number.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/ww1_artillery_shell_casing_identification.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/21089665859clrf8.pdfIn PDF document text
    • http://tibagisuminove.sportsontheweb.net/how_to_reset_firestick_remote_volume.pdfIn PDF document text
    • http://uuuuull.space/45652720636fggqe.pdfIn PDF document text
    • http://myirn.icu/home_design_3d_paid_by_uu70bue.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/computer_networking_a_top-down_approach_amazon.pdfIn PDF document text
    • http://wegansit.space/foderosevifepamipe9oi3f.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/0f34db69-4b50-4137-b551-ab3ea6bb2100/56760879050.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/32159530766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a4ad64-262c-437e-8877-db44658b69e3/la_magia_del_orden_marie_kondo_sinopsis.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/jaligebapinamijolip.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/piano_music_book_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/064383a0-2197-4962-bb9d-07d8c36be3c4/badis.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/dell_optiplex_7010_network_drivers_for_windows_10_64_bit.pdfIn PDF document text
    • http://jabejanaboz.atwebpages.com/71903661804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd1811b-d681-43c0-b26f-3e466d08ae91/luxpro_thermostat_manual_tx9000ts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4e386f2-d7bc-499a-8181-9153905f009a/96948847713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faed0e2b-b3b9-4439-b231-77287e87010e/factory_reset_honeywell_wifi_thermostat_rth6580wf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e433ccaa-3b58-4385-84ef-7bdeb566451c/bapel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe15b30-5b52-4f70-8a2b-4f69f7379076/oral_b_sensitive_replacement_heads_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/napit_eicr_form.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_off0000e6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BA 5736 bytes
SHA-256: bf705319ab025615cdd719cf4b43fcddc47a619eaee23cfcf2c0d31b9eb232f9
font_01_sfnt_off0000fa39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA39 10240 bytes
SHA-256: 9d115cf1a6db256198f3b514584fdc276a17c14cc5be5fb8733c7f653f0f06e0

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