Malicious PDF — malware analysis report

Static analysis result for SHA-256 922df1778bd3ff2f…

MALICIOUS

PDF

84.5 KB Created: 2021-06-04 03:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ea46bfb8a27aa1c6b1ca689e41e2335f SHA-1: 19d5059d95cf572d680917352841cd28eb621fed SHA-256: 922df1778bd3ff2f2960b016ea8470f316e0a62e099b3e600b0e33cd35fc4346
94 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=gutachten+jura+welche+zeitform In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417806/normal_60511ecfad6e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_606148bac77cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wusagem.pbworks.com/f/hamilton_beach_flexbrew_2-way_coffee_maker_49983_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f116c50-8f6a-421f-b5c6-75f81053351a/83703177131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868ee2f1-be91-4c5f-ac05-2c7cb7e9e26c/dnd_dice_mould.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/596517ec-b599-4702-adc9-3aef2172f9de/how_to_make_a_moist_pound_cake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52b5a3f7-eeaa-457d-a67f-2172f5644c9a/frantz_fanon_the_wretched_of_the_earth_amazon.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/f/temilewesiwusum.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144412428/24228657786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf082418-9938-4ea0-a3d2-ab480c037925/pogil_answer_key_ap_chemistry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d06e4b-9d1f-44cc-a95c-96314221b582/study_skills_classes_for_high_school_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99b84fb7-6cc4-442b-b3de-dd5c465f9bf0/nelekizuridoninow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e8d6c2e-c8ed-458a-9d0f-a41baea51d68/78591884235.pdfIn PDF document text
    • http://togiwuvoze.pbworks.com/w/file/fetch/144579555/veteremetituvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79fc1c03-b2f1-4045-acdf-6f06b0b85aac/thrawn_trilogy_comic_read_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75cd073e-ac25-431d-9dfd-7ff2fb6f98a9/gibalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c305e55f-38f5-4675-9c2b-a8f2c40ccde9/lidugiluvo.pdfIn PDF document text
    • http://wepadigisita.pbworks.com/w/file/fetch/144584997/wuwaxogexuz.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_off0000f3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F8 5192 bytes
SHA-256: a3121af6a666e21e84a209e947dfcbc6895888c85dcfa9c8718acf6a2e923ac1
font_01_sfnt_off0001059d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059D 12560 bytes
SHA-256: 29666e9f10e4a1af330a51ec772dbced39f561ea2504cc85c894a61d4336c0eb
font_02_sfnt_off00012e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E48 16080 bytes
SHA-256: 3c98c78c42b1a46d25d63acc61fb2d4d6b2ec9908a0b549f000417ecb85dbf47

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