Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e83fbef1d6a7d9a…

MALICIOUS

PDF

72.0 KB Created: 2021-03-11 16:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d06c2a8d2eacfc85393e911045b7540b SHA-1: 09d3dfd7bfa81bac66e45a8102f1461cfab0e3f0 SHA-256: 6e83fbef1d6a7d9a32d95ec0fb765683b9814857298f72798a836ecba64945e9
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 high risk score. It contains embedded URLs, one of which is presented as a lure for 'biology notes 12th class pdf'. The PDF structure and embedded content suggest it is designed to trick users into visiting malicious URLs, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/award?keyword=biology+notes+12th+class+pdf PDF link annotation
    • http://titoto.xyz/matemticas_avanzadas_para_ingeniera_oneil4q2s3.pdfIn PDF document text
    • http://pubggaming.online/pijunefunesuxiluvutaxikor1jmf.pdfIn PDF document text
    • http://nigma24invest.online/xuvinobovatokotibijevulmsr4a.pdfIn PDF document text
    • https://vozokeku.weebly.com/uploads/1/3/1/8/131857213/4553541.pdfIn PDF document text
    • http://sadovik.me/latitude_e6410_keyboard_functionsd3ipq.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/5357636.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/vebisop/mipadamis.pdfIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_a4082565d69f4192803484d328171afd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wisuw/87799112406.pdfIn PDF document text
    • http://guvivewemubalef.epizy.com/39265850812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbb477c5-bf3b-46de-a670-562e942d97f3/dovotuza.pdfIn PDF document text
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_598e4e02f1644481af861fa7f3bbd8e8.pdf?index=trueIn PDF document text
    • http://rizolejebogu.epizy.com/niduso.pdfIn PDF document text
    • http://puzuritutu.rf.gd/logo_design_app_free_download.pdfIn PDF document text
    • http://tosivasode.epizy.com/tratamiento_absceso_glandula_bartolino.pdfIn PDF document text
    • http://zutawatupasexap.rf.gd/breaking_the_law_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/accident_report_memo_format_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/97985668768.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_f0c11832a8a74240989dac43a63da973.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e80a164-fc1f-41ff-b4cc-5873f1c3597d/tappan_double_oven_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/c_shell_programming_tutorial.pdfIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_753074e368be4b6fbfd0820c7c96d25f.pdf?index=trueIn 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_off0000dd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD98 5656 bytes
SHA-256: c39997e42944d28bfb7cbf94d4bedfee568a873c63b6151e51b9cac0ddbf772e
font_01_sfnt_off0000f0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F2 9900 bytes
SHA-256: 2a014326ba86e10ce8b190af4b0dd085e23025797343c9f86bca6f4e22ed0476

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