Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ccc9b116782b33…

MALICIOUS

PDF

92.0 KB Created: 2021-03-27 16:34:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1dad5eaedaa49a06ac36b2863d5c7166 SHA-1: 18845cec7106afbc60238d9844bf7d2717ca5ac9 SHA-256: 96ccc9b116782b334af23846d3066e0caee49fd91b3ac36661e1f35335d28263
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, flagged by heuristics as an external URI and an embedded URL. ClamAV and an ML classifier also identified the PDF as malicious, specifically a phishing trojan. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a malicious site for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/award?keyword=auxiliary+verbs+worksheet+pdf PDF link annotation
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdfIn PDF document text
    • http://prazdnikprosto.ru/75039081951kg4tx.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/nifep.pdfIn PDF document text
    • http://titanovyi-filtr.ru/microbiology_wessner_et._al._2nd_edition5gk9n.pdfIn PDF document text
    • http://gatorama.fun/mankiw_macroeconomics_10th_edition_answer_keya101h.pdfIn PDF document text
    • http://dexaputanit.mygamesonline.org/33698582927.pdfIn PDF document text
    • https://cdn.sqhk.co/kigoxeni/Pibjb5z/gikawogorixap.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/busutafitufe/trig_identities_review_worksheet.pdfIn PDF document text
    • https://619c993e-e215-4b07-891b-88776ecab8c8.filesusr.com/ugd/1fce43_b175f1e7d7cf49bd8e6b7a5d198c613c.pdf?index=trueIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_d38deca7989148f29ca59e6d2dd98677.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rerinago/700_free_hd_background_for_editing.pdfIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_c2a3afcc4bd447d4a684c95db78769dc.pdf?index=trueIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_e120a2b524fc45c18dbbe0d3fed626ba.pdf?index=trueIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_1777f2a610f94e06965db25f50c331da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widiku/norivob.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/konegeroxobuluzofu.pdfIn PDF document text
    • http://muvemaxadal.onlinewebshop.net/agro_ecological_zones_in_sri_lanka.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/lobudanadazuzinogoxifopej.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/jufifebaded.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/la_famille_lamiaceae.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_off00011611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11611 5644 bytes
SHA-256: 9e955473f066e5edb87be3b7beff09476747d62ba5f13bd1e2bcd56fb91eb645
font_01_sfnt_off0001295a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295A 10468 bytes
SHA-256: a0917196057cc4ae3ce7499b5fd78761777a958739dc8a66e1904bbf1a8352b6
font_02_sfnt_off00014d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D34 16096 bytes
SHA-256: 3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca

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