Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8280d4364ade27d…

MALICIOUS

PDF

74.8 KB Created: 2021-02-15 12:12:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4a4efd93b469e4320af76ba171993f27 SHA-1: 164216e2e0ce63a67f2bf327bbe914b036e2c6d9 SHA-256: a8280d4364ade27ddb1a3f405f836261528f337f0203a86e30e9f044a6e42236
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical detection score. It contains an embedded URL pointing to 'jottigo.ru', which is likely part of a phishing or malware distribution scheme. The PDF structure and embedded content suggest an attempt to trick the user into visiting this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=the+expanse+wikia+mars PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422145/normal_5fce8c3a75985.pdfIn PDF document text
    • https://dakusarifupufa.weebly.com/uploads/1/3/3/9/133997242/dadavubat.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/ii6Se5N/jogege.pdfIn PDF document text
    • http://epipog.com/sample_employee_performance_self_appraisal_answersym3nc.pdfIn PDF document text
    • http://gratoraama.space/vr_theater_for_cardboard_apkdc9az.pdfIn PDF document text
    • http://rm-swis-mine.com/livro_mineralogia79hob.pdfIn PDF document text
    • http://potolkilife.ru/delugemave6zztq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489428/normal_5fd9b287dd133.pdfIn PDF document text
    • https://lidugozomamaxo.weebly.com/uploads/1/3/1/6/131606349/kasukidomemidi.pdfIn PDF document text
    • http://akfb.online/epigenetica_zanichellikmmjm.pdfIn PDF document text
    • https://cdn.sqhk.co/naxusepimosa/Thiiegi/nigaremofubamidux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_6011bae8747e5.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
    • https://s3.amazonaws.com/nisiwanolom/sinestesia_musical.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/frette_king_sheet_set.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/mabajejuvaniwi.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/55546842200.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_off0000da84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA84 4796 bytes
SHA-256: 54e79278f9f91e2d86e437f7c4a86d1ceb1695bf0a59acc10fab94e71b42a918
font_01_sfnt_off0000ea99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA99 10940 bytes
SHA-256: c3056a16fe63521f469bf9626dee093ec434b9ca5ee222b306f37035dbb0565d
font_02_sfnt_off00010fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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