Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d0bde50f80e025…

MALICIOUS

PDF

70.5 KB Created: 2021-03-13 20:37:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcba1f73c457258f6d6c82fac2528cd8 SHA-1: 20c48fd171afc89ff2ac0dc70c2c4e85c7c47d76 SHA-256: 97d0bde50f80e025aa84f1e76fafbc3f0fd5a719d3f64f17bd7d836b3435c002
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that mimics a search result for a free PDF download, a common lure for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest it is designed to redirect the user to a malicious site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/award?keyword=the+bullet+journal+method+ryder+carroll+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4407304/normal_6043f1863ece4.pdf
    • https://cdn-cms.f-static.net/uploads/4374533/normal_603acb61a1e55.pdf
    • https://cdn-cms.f-static.net/uploads/4485711/normal_6043cc8659fa7.pdf
    • http://everydays.space/what_is_the_max_speed_of_a_moped1bh0y.pdf
    • http://ruvogodozipabiv.scienceontheweb.net/59728814770.pdf
    • http://about-igsupport.com/tattoo_machine_builder_the_bulldog_ftr867.pdf
    • http://dalosizofovabes.medianewsonline.com/concave_and_convex_mirrors_ray_diagrams.pdf
    • https://static.s123-cdn-static.com/uploads/4461250/normal_5fdd1a5656c3b.pdf
    • https://cdn.sqhk.co/kujusiru/gFjbnhh/buwonaripure.pdf
    • https://cdn.sqhk.co/balaragu/cjejeja/server_remote_desktop_services.pdf
    • http://zotoxilob.getenjoyment.net/kepimogafiwogaruf.pdf
    • http://juwupexutaval.mywebcommunity.org/skyrim_how_to_become_a_powerful_mage.pdf
    • http://alphabitx.com/96835774159xn260.pdf
    • https://cdn-cms.f-static.net/uploads/4424632/normal_60248755d7063.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4643b304-cc1f-4ab5-91aa-0fadf60dc0a5/27470602855.pdf
    • https://uploads.strikinglycdn.com/files/c400b232-067f-457d-8705-7fdf9f9d4085/kamugosogizorudewowok.pdf
    • https://uploads.strikinglycdn.com/files/be86e998-6c71-4f27-a919-d895f1f6e1fe/army_pay_chart_2020_bah.pdf
    • https://uploads.strikinglycdn.com/files/b98b70da-b683-4ecc-b79e-a558185b6d6d/27624180906.pdf
    • http://koriwironawuva.myartsonline.com/comparative_and_superlative_adjectives_worksheet_3rd_grade.pdf
    • https://uploads.strikinglycdn.com/files/4864243c-0448-45c0-a02a-d6137fe91a79/what_to_do_if_someones_pet_dies.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d46d.bin
8cb4c58a75259cc2075432fd67aa5a65bc12fb59e90a97340957044938e02070
pdf-font-stream PDF embedded font (sfnt) at offset 0xD46D 5576 bytes
font_01_sfnt_off0000e74f.bin
0c76a9aa0473cb52bdbaf5658d3dd76f0acd6e1d883d8144ed4612bf41a651de
pdf-font-stream PDF embedded font (sfnt) at offset 0xE74F 10860 bytes