Malicious PDF — malware analysis report

Static analysis result for SHA-256 4147e1f44733089b…

MALICIOUS

PDF

85.3 KB Created: 2021-03-18 09:24:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 065a177a1ed2ddd1fc020f63b6a08a6d SHA-1: d03b86b02cb69ae2b7eeba07263b77c48c45b4da SHA-256: 4147e1f44733089b3ba0e7fc3942ff1d0e1c58a7c46dca228b0321e1806e6034
96 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, one of which is `https://ponafet.ru/award?keyword=bank+aptitude+test+questions+with+answers+pdf`, suggesting a phishing or social engineering lure related to job aptitude tests. The document body, though heavily obfuscated, appears to contain metadata related to the file's creation, reinforcing the document-based attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://ponafet.ru/award?keyword=bank+aptitude+test+questions+with+answers+pdf PDF link annotation
    • http://powuvomewekuxeb.getenjoyment.net/pebepogogoranujor.pdfIn PDF document text
    • http://bexemusu.mypressonline.com/rusoloj.pdfIn PDF document text
    • https://cdn.sqhk.co/naruxibe/jzbReGJ/bnf_hypertension_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/giiirgf/wajukaxorofofipuzijitefa.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CFgdiND/wobokosomapodotiw.pdfIn PDF document text
    • https://cdn.sqhk.co/wovenebi/MiXjiha/boxhead_zombies_2_player.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/wawop.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/4jaXRqf/45976142395.pdfIn PDF document text
    • http://gikodarekegov.mywebcommunity.org/functions_of_hrm.pdfIn PDF document text
    • http://faxusigeroles.sportsontheweb.net/how_to_program_harmony_650_remote.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/d8LR3JX/vegegije.pdfIn PDF document text
    • https://cdn.sqhk.co/xurakipigub/gcjiicD/word_puzzle_free_offline_word_games_crosswords_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/memenewo/iefigjb/sunul.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/heifhbC/the_sims_resource_magazine.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaso/ODhkzge/13434519835.pdfIn PDF document text
    • https://cdn.sqhk.co/banamasuvaj/ejgNsic/whatsapp_web_qr_code_scanner_download_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d8097ec-de91-4ad7-a7f8-32a9069b8c7d/24793602705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9eb8b9d-75a0-40e9-b91a-bcde0350593c/wumujikozavobixite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c51ed3-4df4-4805-9951-0b7cf506568b/26004108250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/775844ae-3936-446a-be8e-9efa709d36fb/rcbs_reloading_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/323b8605-a9db-4024-bfee-2a43e8b749f3/tetajapepapileviziwutimid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39fe5450-566b-494a-847a-721f80e3e0dc/24655811379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86d60ca1-b6b3-471e-9e51-a63066c57e09/cuanto_es_3_4_de_pulgada_en_mm.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_off0001105c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105C 5428 bytes
SHA-256: 25c2b3a2fa6183decd2eebcd1ff8d8d3ba19ece1a0113e3161c8988e77182e91
font_01_sfnt_off000122df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DF 10880 bytes
SHA-256: 886204080321877f5172c7d72e6c0d67bae8fb2d6172352d5e3f1f1431cc046a

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