Malicious PDF — malware analysis report

Static analysis result for SHA-256 20919c800088a4e3…

MALICIOUS

PDF

208.9 KB Created: 2021-04-07 22:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: ce598952d964032342b5f7dd83ed7b8d SHA-1: 446fe8261361b8273fb5b1b71c57beb2b846ec42 SHA-256: 20919c800088a4e3ecd336965e802dbed6c81c8b3a8de8f18255be14302118a0
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF document that employs a social engineering lure, instructing the user to install a browser extension or update to view content. This is a common tactic for credential theft or malware installation. The presence of external URIs and a high ML classifier score indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it may exploit vulnerabilities or redirect to malicious sites, potentially leading to further payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://zajinet.ru/123?utm_term=bona+fide+occupational+qualification+definition+yahoo+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405895/normal_601fbc0c26b96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415302/normal_605c5f17b09be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_601ec570e05f3.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/tigTJha/60231564213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481662/normal_6027a97cc02a7.pdfIn PDF document text
    • http://nizuxep.iblogger.org/rizuzetarurimegewidu.pdfIn PDF document text
    • http://dayzcommunity.info/awareness_test_moonwalking_bearleaeg.pdfIn PDF document text
    • http://masajsalonunuz.com/xigeberuridiusrr7.pdfIn PDF document text
    • http://fishland.store/tabela_brasileiro_srie_b_2020ltkw8.pdfIn PDF document text
    • http://tukorekurig.22web.org/alzheimer_que_es.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/gf4dVha/39600903347.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384482/normal_5ff38b0a6fa5e.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
    • http://susodiwur.epizy.com/21263963312.pdfIn PDF document text
    • https://c8f0d892-4c73-447a-841b-b6a48a565a7d.filesusr.com/ugd/928a57_fbb7ea65c3384e2b9f12595d293713eb.pdf?index=trueIn PDF document text
    • http://jufakoxageponuz.rf.gd/bexifazunonogarenizor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d51fb8-5275-4866-9ca9-f6c28ce3e774/56289629196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8def4bb9-dca3-4749-8bdd-5d503f67feaf/what_do_the_symbols_on_omron_blood_pressure_mean.pdfIn PDF document text
    • http://retobawunabe.rf.gd/waninugibuxuvud.pdfIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_0d063d962ba249758fb7cf6cb9069555.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f77a584-24a4-4302-9cf6-b741b2ea44d3/computer_basic_course_certificate.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002d655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D655 5492 bytes
SHA-256: e525536903b56241d254d62c28afd2b097b6c82eec127077c64568f0cbe44b24
font_01_sfnt_off0002e90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E90F 12268 bytes
SHA-256: 745c0a211f96e0cc3f49812fbb79000b51b25ccd988e870b69a3afebca77b05e
font_02_sfnt_off0003119b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3119B 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7
font_03_sfnt_off00032633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32633 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.