Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c50875f7c9d5b5…

MALICIOUS

PDF

131.4 KB Created: 2021-03-12 18:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ce3154e1e9816228f86deea5eb1bcd9b SHA-1: 298e5aed0292932c3dc588a9d56095dd7709f821 SHA-256: c9c50875f7c9d5b5c4e09c3a30f8424f27e2dad3c58ebc4dec260c0d798e1c2f
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The document contains numerous embedded URLs, with a primary focus on https://soxebez.ru/award?keyword=west+side+story+maria+score+pdf, suggesting a lure to a malicious site. The PDF's structure and the presence of many links on disposable hosting further support its role as a phishing document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://soxebez.ru/award?keyword=west+side+story+maria+score+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473432/normal_603062eec416c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445877/normal_604343a67e5d4.pdfIn PDF document text
    • https://cdn.sqhk.co/fufejapopunu/vhi9jA8/juwotibapipar.pdfIn PDF document text
    • http://vexasefagi.scienceontheweb.net/will_there_be_a_5th_eragon_book.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/ifidcje/the_36_strategies_of_the_martial_arts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529281/normal_603213af340c3.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuwajavi/jg1FaRL/64674954720.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/78605136171.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375884/normal_6005e54fe0291.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/bnhsaUq/java._lang._outofmemoryerror_permgen_space_tomcat_7.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/jjrp9gf/vufosurigag.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/66335655315.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/jiloxegajevidotuwutuj.pdfIn PDF document text
    • https://e7ba4f66-d023-404d-a355-a5b98970f127.filesusr.com/ugd/cac9e4_aa3025fab04b4218adb016d51d65c360.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/31583967718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba1721f3-64be-4702-8b68-3948fdff0957/rapajusapawelifiwes.pdfIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_906de7defc3a4e57b00ea43298b32863.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/57064267234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/287d502a-5894-4089-ba07-69f405696e21/depurega.pdfIn PDF document text
    • http://susabumo.atwebpages.com/what_are_the_5_types_of_plot.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/30373156187.pdfIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_589fb7c9184c4b6bafcb50c31348872d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3007f3a4-3268-4617-96f5-709ec4054a93/vuxerijewujupu.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/govibatebojutolizefuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4078ba3a-0ada-463a-b0c4-d57ba09a389f/hp_deskjet_2132_all-in-one_printer_driver_windows_10.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_off0001aea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AEA5 7940 bytes
SHA-256: 38fc49226be8f03c3b1a3e4e1533c3c0f03cbf97f3bf540bc40606f572e7cf66
font_01_sfnt_off0001c983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C983 5384 bytes
SHA-256: f2a4ccfe3a4c54963140160d6e44d58ec025e8b09af97575dc5488547d8982bc
font_02_sfnt_off0001dbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBCD 10316 bytes
SHA-256: 83e8cdc7db6a6ba9a2ddc82a1664d0af851a28558357b8942d20ba3bf6721193