Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3727b61e977813a…

MALICIOUS

PDF

81.0 KB Created: 2021-03-16 03:01:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7726423e9f46051d8155dcc6f42769a4 SHA-1: 68454be50d993f4daf74465b7c5c1f13b9cdd1cc SHA-256: b3727b61e977813a760c6353c48e57495684d949886aaa693b63a9284cde63a6
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a site offering a 'who moved my cheese powerpoint free download', which is a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a second-stage payload via the linked URL. No scripts were extracted, but the PDF structure and embedded URI are sufficient indicators of a phishing attempt.

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://jacksth.ru/wix?keyword=who+moved+my+cheese+powerpoint+free+download PDF link annotation
    • http://murimubijejaba.mygamesonline.org/ccmt_2020_cutoff.pdfIn PDF document text
    • http://icub.tech/69352105297uxy5z.pdfIn PDF document text
    • http://gidonuvawugirid.medianewsonline.com/philadelphia_terminal_map.pdfIn PDF document text
    • http://magic-world.site/was_blind_but_now_i_see_bible_verseffts3.pdfIn PDF document text
    • http://mixed-rootwork.com/52837885200iretn.pdfIn PDF document text
    • http://keep-travel.com/fanon_wretched_of_the_earth_analysis0zj58.pdfIn PDF document text
    • http://xanejog.medianewsonline.com/74341835420.pdfIn PDF document text
    • http://eurozone.pro/nulasil7vl0i.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/duzexefemosaxe/what_is_the_difference_between_essentialism_and_social_constructionism.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/completing_sentences_worksheets_1st_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/91329766254.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/quran_app_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/wezesejog.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/cinemax_nitra_program_zajtra.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/xadutiwaweremokuli.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/88601246637.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/interview_questions_for_accountant_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/tujil.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_off0000ed79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED79 5448 bytes
SHA-256: edb014f37e4c90d2e2a51b40d484a7eded120756fe72a514b02c79ecf3db37cb
font_01_sfnt_off0000fff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF7 11584 bytes
SHA-256: 4aa8585e4ba5e6504d6c9ca06b9114e87254ed74f3f8a3043c862bebd2ae589a
font_02_sfnt_off000126b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B7 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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