Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f5b65d9b845cb0…

MALICIOUS

PDF

80.8 KB Created: 2021-07-22 14:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3c82feb1f088318826c2368436995724 SHA-1: 9afba7da0ee5059c5e26da05ce7e367dda6a9484 SHA-256: 20f5b65d9b845cb09e113953e255087a32419ee3fca9fdc2f5c239c8403614c0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. No scripts were extracted, but the PDF structure itself is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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/r_nBws6J8g8/square?utm_term=how+to+defrost+puff+pastry
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8e77acc7c08645923fa94/1625876346787/nosidigagaviwuwunuxi.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0655bf7631232ce0e268c/1626367323349/solas_chapter_4.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f3b9336c177f33d7a742e4/1626585395270/9.5_divided_by_2.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90e0266be7e490f0ed184/1625886210930/89536953054.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1b12c045ef15350a1b976/1626452269186/subujovilokopajarotados.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0256438a0fc3ca96a708c/1626350948312/47894525235.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f09d8f98a075036aa87aa5/1626381711646/54706166754.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e9418a8ce0e10532d3afc9/1625899402554/60065055347.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f3cff2731d8c7c6f024943/1626591218264/83090899789.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f65cc8b2b0835cff99a1b4/1626758344283/gelumulisowolexinidaduv.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed9fde5a30a704d0c02c3e/1626185694292/in_blood_typing_the_gene_for_type_a_and_the_gene_for_type_b_are_codominant.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f5f17e69c15459d78fbd24/1626730878484/4076884852.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8d2a63bde986563e493f1/1625871014242/sessile_leaf_example.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f6725d4920142c5d9cf258/1626763869270/level_3_teaching_assistant_interview_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f81a9362d1b164c89ae060/1626872468131/year_4_english_worksheets_with_answers.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f18d2b2b6fa9024f8bc6a1/1626443051612/gofulanewegigivajo.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecabb4af807f1e15295c72/1626123188880/wegolekavisezepijikev.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f07dbd3f5e7b0f5ec50fe0/1626373565589/73410037073.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec93a8e7718717d76360cf/1626117032819/beethoven_choral_works.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e93753b132fa3620743b7f/1625896787241/a_quiet_place_part_2_free_to_watch.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9263db132fa362073b3e1/1625892413878/kuxenoxibogezexexenuvezux.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f1db56f6196c11e7b4462a/1626463062956/vudumirakeget.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f412debb7e64222dff7a50/1626608351040/gipidad.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d99a.bin
c2b35c6ba1019c5b8be9acb7dd0017b3b64e08c401f2fad314227533b07ae722		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD99A 10540 bytes
font_01_sfnt_off0000f1d0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D0 16792 bytes
font_02_sfnt_off000109e2.bin
3775c3e7458e5ab22b62f908bd16344f74080a1ea47f6100688314817ab4e0a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109E2 16972 bytes

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