Malicious PDF — malware analysis report

Static analysis result for SHA-256 a10ffba1f7f735f3…

MALICIOUS

PDF

83.8 KB Created: 2021-05-21 23:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a99deb1ef1690bcad4ddead85a577ae1 SHA-1: 2baaa7b5593bad6af20bf18d466dfe90fb9c0930 SHA-256: a10ffba1f7f735f33981008a9d86713f2b2829c3cc1792d5539691cb19469b3a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, 'xezojetit.ru', which is likely used to host a phishing page or a second-stage payload. The document body, though heavily obfuscated, suggests a lure related to historical Turkish poetry, indicating a targeted social engineering attempt.

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://xezojetit.ru/strik?utm_term=tanzimat+d%25C3%25B6nemi+%25C5%259Fiiri+genel+%25C3%25B6zellikleri PDF link annotation
    • https://dodirubiv.weebly.com/uploads/1/3/4/5/134505429/514db18e2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379477/normal_5fdd88d52ee2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446168/normal_5fd7cca675799.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529149/normal_6062323eee5af.pdfIn PDF document text
    • https://galekogikelubem.weebly.com/uploads/1/3/1/4/131438025/2746acb.pdfIn PDF document text
    • https://zopupafi.weebly.com/uploads/1/3/1/4/131454349/4354432.pdfIn PDF document text
    • https://bexudedumazises.weebly.com/uploads/1/3/1/4/131406785/0b64c599178e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451929/normal_603dba63da79a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386607/normal_602069847e4de.pdfIn PDF document text
    • https://kofuremejekesor.weebly.com/uploads/1/3/4/2/134235353/mewojunito-tapikepomidos-lujoza-zomikejogu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501054/normal_5fc86a186b227.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/jolunenafobuw/personality_plus_for_couples_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d765d04-7022-4ca6-89d9-d5b686987d7a/ar_15_magpul_sling_mount.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1951d2e-d3de-435b-9413-1a1e612460a9/based_on_the_map_which_of_the_following_countries_has_the_highest_annual_income_per_person.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/nunifeluf.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/how_do_you_cook_a_turkey_on_a_weber_gas_grill.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/mejores_cursos_de_ingles_gratis_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a8ebd5d-456d-45e3-b336-da4ae1ef4928/69721542076.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/ludixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/288c06c1-7558-485b-98d1-99ca92b59ebe/7682077441.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/mizosuxurerudalefelekafef.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F9 5416 bytes
SHA-256: 286f8394a3c172a4d289709572205a2c45295d253eb603eb212db9b9b51e3643
font_01_sfnt_off00011914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11914 12688 bytes
SHA-256: cd5792dac2eb21dd90368fcb291ad03e6e5352862927c1f18990f9628faa0e82

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