Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4937e4022a9386d…

MALICIOUS

PDF

150.5 KB Created: 2021-03-18 14:44:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9d2cf82a870f91f6efa275be8a798254 SHA-1: 5339e3bfbf91be1e09be043660776dcc0c1eaf38 SHA-256: e4937e4022a9386dc1811c7e8998f34612c9d7af22961f35423a03875603d937
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 0.9974

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://jumiwimov.ru/award?keyword=ariston+oven+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/xaranoraf/aDfxgeC/vadipobop.pdfIn PDF document text
    • http://kdghy.online/257849468535sbok.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/panasonic_nn-sn67hst_1.2_cu._ft._inverter_microwave_oven.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/fG6Nnhh/dajatipinekuxojevujud.pdfIn PDF document text
    • http://giveaway2020.info/concepto_de_manual_de_organizaciones_y_funcionestgbxb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495849/normal_6029fb047025c.pdfIn PDF document text
    • http://appletopshop.ru/nipobujqwlfy.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/Jijzria/87478959832.pdfIn PDF document text
    • http://miiliioner.xyz/wolf_launcher_android_tv_apkqlkqa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_6038055f7c554.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/GhbfO5D/the_innsmouth_case_review.pdfIn PDF document text
    • http://floradoma.net/tableau_voyageur_contemplant_une_mer_de_nuagesimmju.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
    • https://uploads.strikinglycdn.com/files/4bb59e4c-7630-41cd-881b-adac0f8493f2/79935118587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f392b1de-38ca-43bf-8181-c041b1e093c3/2_nephi_9_23.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e3c90b9-cbc5-47c6-b3b0-18a50a72da56/how_to_create_consolidated_financial_statements_in_quickbooks.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/is_nigeria_a_free_country.pdfIn PDF document text
    • http://palexibibiw.atwebpages.com/gujok.pdfIn PDF document text
    • http://zapusov.atwebpages.com/62088628272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b71212d-4294-4abf-a129-85008503adcf/35624021360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b7d4e36-8ae9-475e-98a6-6086d962bce4/netgear_gs108pev3_default_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b611a749-f683-4abb-b605-9a58421f9b08/99365994214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a4d0332-ff22-4190-9e18-374527d700e2/1996_polaris_magnum_425_4x4_parts.pdfIn PDF document text
    • http://duziroro.myartsonline.com/what_if_marvel_episodes_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e03e6f-257d-4bc5-a3a7-93afdcb14187/4095013497.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_off00020423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20423 5120 bytes
SHA-256: 2c4bbd3ec6e53ca3bd4a0c60be34b83806e80747c6811b660db813383d4bd285
font_01_sfnt_off00021570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21570 11852 bytes
SHA-256: 0da22b99cb219153554d6d70af2b81e7adb0a7f7e8fea53254e55f5ee5fd006b
font_02_sfnt_off00023dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23DBE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34