Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbee86ecbf3b1d1c…

MALICIOUS

PDF

81.5 KB Created: 2021-07-20 01:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ebe3376c960bf7977fa633648c9888a1 SHA-1: 4d9a7e5f87481e2c263a32a2f2ce08b99fe66905 SHA-256: cbee86ecbf3b1d1c509dd130d9dc2d79551a3a88d416521014dade004eb7beeb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. The presence of embedded URLs, although many are marked as benign, suggests an attempt to lure the user to malicious content or download further stages. The file's structure also indicates potential exploitation of PDF vulnerabilities.

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://feedproxy.google.com/~r/sq/ugae/~3/UZrB20b2Dcg/square?utm_term=design+drawing+frank+ching PDF link annotation
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e920676e267257943ad19d/1625890919373/coop_shared_branches.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f34039c2d40e67ec0a15ae/1626554426084/43525767622.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edcbeaad58ca03d224b51c/1626196970303/23877620306.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee77822485902f3e76d507/1626240898826/soluble_fiber_and_insoluble_fiber.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f5fef00242d70f9f36ac74/1626734320754/android_free_internet_hack.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f4578e952f835132def301/1626625934929/mupivabinoniniw.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f2a5ebac7784023563a79b/1626514923813/rise_and_fall_of_sam_axe.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecab721cff58014d57b0a2/1626123122274/negenobodulisegokiwo.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee3174462f394a1e4149e6/1626222964819/stride_length_meaning.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8b7a02aed95181853a470/1625864096763/aizawl_places_to_visit.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee6570f72ce0266e125d0f/1626236272951/placentitis_in_humans.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f5f2156aa88312393e4159/1626731029501/81184838638.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f4cbcfec5ad00cc0a0ea11/1626655695604/pigafeloxifojobowo.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f49c51b84a576e6c0e61d8/1626643537682/nutrition_quiz_questions_and_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee540a9b1e4d6a360eb4bd/1626231818368/october_3rd_mean_girls_quote.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 10672 bytes
SHA-256: 974b4e939e18f4216657403f267a12f9da2d6693fc6e2cd3c9cc551a500393a3
font_02_sfnt_off00010b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B19 17128 bytes
SHA-256: 6d2e1f1e223c2d1fca1836a9508fa779ef06548f7eaf0aa9950d60940c2b43f0

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