Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8dde0ff603216d3…

MALICIOUS

PDF

76.3 KB Created: 2021-04-04 12:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1af291532a16be0b449bfdffd540ef00 SHA-1: fefa48a5315e0d2465772970dca86881440fb391 SHA-256: d8dde0ff603216d33c7b6112b9f5c1684f20bf490fa9f451e3ded0d194eadbc2
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 multiple heuristics and a machine learning classifier. It contains an embedded URL pointing to 'fokemale.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'Kalender 2020 thüringen pdf'. No scripts were extracted, but the presence of an external URI and the overall detection profile strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9606

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://fokemale.ru/award?keyword=kalender+2020+th%25C3%25BCringen+pdf PDF link annotation
    • http://mavisuvegepufi.iblogger.org/what_is_agile_scrum_development_process.pdfIn PDF document text
    • https://cdn.sqhk.co/wasulevilid/jhgcjdk/funulofetekumegu.pdfIn PDF document text
    • http://kekedisinodorul.iblogger.org/add_text_to_document_on_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/XtGijiy/62029739698.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/8ebb3af6-be64-4057-ba35-e2ac6a7e6b3f/creative_visualization_techniques_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e57cc3d1-3e53-4e57-8ab3-d00bca29786f/what_are_the_components_of_an_effective_communication.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/poretagifaxegi.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/kemekazozilejudadumipoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f1d7fa-80ae-4366-bd6c-dfe34ac77ac8/where_is_garbage_disposal_reset_button.pdfIn PDF document text
    • http://xumasadepa.epizy.com/sewing_machine_parts_crossword_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/razuredaxirunefudotolowo.pdfIn PDF document text
    • http://lujolugajejizog.epizy.com/32092290593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91686a7-0fb2-4bc4-971f-df98280b3ffe/when_is_the_season_2_of_no_game_no_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2c61093-8ab4-4efc-b1f0-c418a3248536/53306463597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0952a7c2-2517-469a-868a-374cb6593a50/95377538037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e333145-2b6c-400f-9169-9f47be7fee0c/40519781966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b6a5f8a-4acf-4093-9907-a3a59f334073/93445212987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae73475d-a8ef-47a0-b2cc-2b61092c197b/adjusting_journal_entries_reports_in_quickbooks.pdfIn 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_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 5488 bytes
SHA-256: b0d6ae9233469c6a8d10126b0783df4743cda4772acce04628ff97f969b0aa49
font_01_sfnt_off00010a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A85 12100 bytes
SHA-256: a72b8de330a04d4e3af2a59c4a97dc3d34e0ac4da1600e9be665ed95dbce84a2

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