Malicious PDF — malware analysis report

Static analysis result for SHA-256 66af21df87d78bdc…

MALICIOUS

PDF

90.6 KB Created: 2021-03-17 06:05:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 05cb2043b7ac4f38f9159789da71c095 SHA-1: 1dc427992bf77f54205c77aacc9cc6baace3efa2 SHA-256: 66af21df87d78bdc65a8ad2e1abd27589128aac49cfecaf9bdcaeb2cc7235ca4
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that, when visited, likely leads to further malicious activity. The document body, though heavily obfuscated, suggests a lure related to 'service manuals', aligning with a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://leonvi.ru/123?utm_term=broderson+service+manuals PDF link annotation
    • http://mufinofol.scienceontheweb.net/doxawaboburagep.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/bissell_symphony_pet_vs_crosswave_pet.pdfIn PDF document text
    • https://cdn.sqhk.co/logenuzupug/jim13Oc/nazizuwalibajobomititoxa.pdfIn PDF document text
    • https://jizufuvarax.weebly.com/uploads/1/3/1/1/131164460/4897986.pdfIn PDF document text
    • https://cdn.sqhk.co/pimupigedu/iiighcY/yu_gi_oh_duel_links_download_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lofatadub/cYrseii/work_at_home_song_mr_jatt.pdfIn PDF document text
    • https://xufanipup.weebly.com/uploads/1/3/1/8/131856619/pixesos.pdfIn PDF document text
    • https://laxedojopepab.weebly.com/uploads/1/3/4/8/134896069/takuraxuza-nuxekado-tebetebape.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/zepagukopogani.pdfIn PDF document text
    • https://megewesaj.weebly.com/uploads/1/3/0/7/130738707/335bb.pdfIn PDF document text
    • https://lixazasowab.weebly.com/uploads/1/3/4/5/134588429/e179a50b811b6f.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/SehbAnk/xawopotagumizamez.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://todiwefexoneb.atwebpages.com/pdf_to_word_converter_online_free_for_large_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c421c658-09d9-47b2-b43a-5b6d69903f36/virginia_health_and_safety_update_training_for_childcare_staff_2018.pdfIn PDF document text
    • http://molujafit.atwebpages.com/83588200671.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/integers_and_absolute_value_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/formation_automatisme_industriel_lyon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64b7102-ee36-4334-9ea9-47c3c10e7306/engenius_eap600_reset_password.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/barupaxoziralis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8213e04e-95d8-44fc-a4d2-01eec563bb52/wanoxuludazum.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/95139988469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6c58e7c-aaf0-4bb0-87c0-1826ada5031c/suxisakusafom.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/39432816309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a58b81-b547-4cdf-8c84-4ccca6c5d209/el_pais_de_las_sombras_largas.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_off00011a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8A 1816 bytes
SHA-256: 2682d8202b4d2b93acd227c355a66cf16aea2188825fbb85d50e4defe05b20e2
font_01_sfnt_off0001235a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235A 5196 bytes
SHA-256: c84e973b8d955491602583dedc9eec6ca24b8ff1b3bbff170068d7b837335155
font_02_sfnt_off000134f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F3 11544 bytes
SHA-256: 7c3c1f98f0e97e9deaca3a0a4ac04cbef8e315b7e95bba012b8faf19c5a71aca

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