Malicious PDF — malware analysis report

Static analysis result for SHA-256 dec2325e98da4c71…

MALICIOUS

PDF

67.2 KB Created: 2020-12-30 08:07:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8592badce77f60c8f094b0f17120994f SHA-1: eaa7ac43ca4842e919c77ef33e1255b7cb6b55ac SHA-256: dec2325e98da4c71c7ded1ecfd5028799dd67534d0ffb86098381f81b4072b2b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. ClamAV and ML classifiers have identified this file as malicious, specifically as a phishing trojan. The document body, though partially corrupted, suggests a 'worksheet' lure, which is a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=scoutmaster+conference+worksheet PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/762386b2-2ad6-454e-857b-4af6afbb59e8/37906812868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d93f53a-ce52-47ad-a45b-d9774911d27d/2017_jetta_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/disokuneku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02dfac0f-5a9e-4698-9caa-cc7aa912c4a1/camp_background_images.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/film_evan_almighty_2007_sub_indo.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/staff_appraisal_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/gubipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39cf3dd3-7cff-4117-bb96-c37a05208a0f/59964533872.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/new_mexico_physical_therapy_jurisprudence_exam_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/jabariya_jodi_movie_khatrimaza.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/edelweiss_sheet_music_voice.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/sadusawawexetew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb27c1c4-e668-4ecf-9606-8aaa0607c496/sabajukojavikug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4838a37-583e-41fb-88f6-172f01b380c9/introduction_to_business_quizlet_chapter_11.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_off0000c99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99F 5348 bytes
SHA-256: ea57ea040d93ba6a0e9d6c51a0ba85175471812d81384be20fc209f2578ad3b4
font_01_sfnt_off0000dbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB5 10464 bytes
SHA-256: 06bdba4ae1cd91067b1dd1b5939f22b62179ff25dab73a7622a39505000c14e2

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