Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02307c6e9cd3cca…

MALICIOUS

PDF

96.7 KB Created: 2021-07-23 01:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5ad3ca25869ec9d4248650283d3855ac SHA-1: f47d8221f9311a81222176edf41e7290f4cbd69b SHA-256: c02307c6e9cd3cca61436c3332c95b67938092afaeb3d241a006ca02fe06840b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. While the document body is heavily obfuscated, the presence of embedded URLs, even those initially flagged as benign, suggests a potential redirection mechanism. The wkhtmltopdf authoring application is unusual for a malicious PDF, but the overall detection points to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/X6hrLWyzjlw/square?utm_term=lines+and+angles+class+5+worksheet+pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f633d149ed543a17d861b8/1626747857380/seven_years_love.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee22b1fb3cc800db5381db/1626219185621/leadership_lessons_from_moses.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f8c671ab987d687e6921f8/1626916465226/pme3_ligand_type.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ececeacdb2ce13c5201f60/1626139882550/medical_certificate_format_for_physical_fitness.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e77f9368387303f3a0c717/1625784211394/4180299038.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f7f8c6c92ef868b925f47c/1626863814890/dijogavedulifaxojijuvaj.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edf0407ce58f02ed95bac6/1626206272504/the_space_traders.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f96531f6b38207f73ffa7e/1626957105147/spiderman_unlimited_download.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f76031df23e9670e1e6708/1626824753575/blue_chip_stock_fund.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f4d35b2117d935efb71d7d/1626657627100/iclone_facial_animation.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60efda6cb3de5a36b1252e23/1626331756668/i_have_a_neck_but_no_head_riddle.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edd5c6cb43530604a70d52/1626199494999/du_recorder_download_android.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f04900cd43c673cd1266a0/1626360064130/keeping_up_with_the_kardashians_season_16_watch_online_free.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f173548ed7c6554e7e61c7/1626436436265/niriwarenowi.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8ecb966be7e490f0d269d/1625877689637/xadurapebabiloji.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7f9ba1f8f93f64ab6756/1626111899788/binding_letter_of_intent.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e894d318d26423105320ed/1625855187246/filing_a_grievance_against_your_employer.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f2b158a9adb728039f7fd9/1626517848696/names_that_begin_with_aj.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f5927a268fab0ca9875681/1626706554458/8485303063.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee8875fb3cc800db599671/1626245237763/centroid_of_a_triangle_ratio.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f944299f96d85b0b964315/1626948649761/541790321.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_off0001125a.bin
82656fcd150745877e49bb0e21da9929ace00545675c22d1bb0b29fe1977d266		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1125A 17684 bytes
font_01_sfnt_off000140e8.bin
9fed6bf0ae6fb9ba6176c4457f229e9877ef6c019917c5afcdc71ba4747c295d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140E8 11168 bytes
font_02_sfnt_off00015ad7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AD7 16792 bytes

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