Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d86833b3f71ef5c…

MALICIOUS

PDF

66.3 KB Created: 2020-11-24 22:18:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8b15cbf9b01b7b7e938f9e0576d10c42 SHA-1: 0751f9ee830683e88b7aa832f30da26333772ead SHA-256: 6d86833b3f71ef5ccef43098391dbd94a5950f736bb34c87294db160efc4206a
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 suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit users by masquerading as an educational document to drive them to a malicious site.

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://traffking.ru/123?utm_term=scientific+method+activity+pdf PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc46b8ea-c185-4799-98b3-9ec1e7cf76dc/rinasepimafoforatewog.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/introduction_to_java_programming_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/padagefu.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/triple_bristle_toothbrush_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/oakridge_elementary_school_eagan_mn.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/cell_organelles_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/patat.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/rpl_application_form_uwc_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/xusuvux.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/50466214372.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/xaxoxinurereresetoxup.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/55348027641.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/haughty_crossword_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/general_body_plan_of_mollusks.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_off0000c791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC791 5352 bytes
SHA-256: 9c9235f54f88bb95e0eeda2879f89d7b1bd975d3c66da14f6222e74d13961262
font_01_sfnt_off0000d9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BA 10192 bytes
SHA-256: 3ea938900fba5aaa54bc35829f171d077255e984422dc2610f7cc3eddf7fc28c