Malicious PDF — malware analysis report

Static analysis result for SHA-256 473493b7a4e124ab…

MALICIOUS

PDF

76.7 KB Created: 2021-04-02 13:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2da0e5b51619f9ecf6a9ad542d98e856 SHA-1: 189233b72b6637f55a899d8e5ba40c9038257906 SHA-256: 473493b7a4e124abfd0579ff666ff24165b9f7e08cf48aa55bf9f2c4effa6ef8
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by 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 0.9997

Heuristics 4

  • 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://gimoguvi.ru/123?utm_term=else+if+in+rtf+template PDF link annotation
    • http://rejamar.sportsontheweb.net/arabic_practice_worksheets.pdfIn PDF document text
    • http://003-center.ru/31168501546qt28y.pdfIn PDF document text
    • http://bafakuvim.sportsontheweb.net/blood_relation_reasoning_questions_with_answers.pdfIn PDF document text
    • http://vuxijagodoku.22web.org/benedokomotularulavogux.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/what_are_the_service_intervals_on_a_mini_cooper4ixzm.pdfIn PDF document text
    • http://italywow.pro/los_medios_de_comunicacin_para_segundo_grado0l4me.pdfIn PDF document text
    • http://homebig.space/city_of_houston_tickets_and_warrants8m5xq.pdfIn PDF document text
    • http://tramlaweq.online/kikaxcrezs.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/3fd7c84f-54d0-4fb1-874c-bbcd665cefda/buku_plato_timaeus_and_critias.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e76a1191-1335-4ea5-8f97-b9bb5d4d274d/can_i_take_my_permit_test_online_in_arkansas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dce9313f-ff27-4dfb-ac6c-3f5db90b3727/how_to_start_your_own_trampoline_park.pdfIn PDF document text
    • http://tofujuwo.onlinewebshop.net/1900_buganda_agreement_download.pdfIn PDF document text
    • http://fikelamizogu.myartsonline.com/artificial_intelligence_projects_for_computer_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba598c8-f234-48bd-b936-eeb93a3570ef/how_to_draw_animated_eyes_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c01aace3-61ff-4e90-b814-bb4d9e464455/wifafozegakumerodid.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/fivogilosabopisaz.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/toy_defense_3_mod_apk_terbaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebb44d67-4671-4f26-822d-1000c5873055/ley_1010_de_2006_en_su_artculo_7.pdfIn PDF document text
    • http://dolifusekaxug.epizy.com/49726870476.pdfIn PDF document text
    • http://pokosaneloweb.epizy.com/kewuwoxosib.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DF 5004 bytes
SHA-256: 9e3e5d18b102a0c8077a3ecdc332bbaad85fd666e5ccb5ff74c853661513e9a3
font_01_sfnt_off0000e7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CB 11872 bytes
SHA-256: a272db085a2d4522d94123bbf34c74b5c8fbba5b1f52182c2101c9d6c58c6b8c
font_02_sfnt_off00011078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11078 16080 bytes
SHA-256: 8f6ddafd3b0ce2004b9503adf603897a58143e210ca714e8dcfcba1b249cf112

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