Malicious PDF — malware analysis report

Static analysis result for SHA-256 145c95e49fd64e3a…

MALICIOUS

PDF

81.8 KB Created: 2021-07-21 16:01:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b65e980c279e1ec0189c7a191ddf40a8 SHA-1: 244a1436c9e15330d56d13a5648688bd6c928f3b SHA-256: 145c95e49fd64e3a49222afb696eda4de2b008e26a8239a07ad1d9f932894ea8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that points to a suspicious domain, identified by ClamAV and ML classifiers as malicious. The URL likely leads to a phishing page designed to deceive users. The file's metadata indicates it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://laborke.ru/square?utm_term=year+4+english+worksheets+with+answers
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f2c63e26c2747482d8f3d6/1626523198463/poisson_expected_value.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f432da50974615f92a60a2/1626616538569/51060665336.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f15e9fb348e55d1c539fa0/1626431135556/85434271503.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f163ed5142327a874409af/1626432493564/peripheral_iv_cannulation.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f813e228ef380684084f5b/1626870755051/the_fox_and_the_crane_story_in_english.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec8f4351a87c5d75acc6dd/1626115907440/96279340326.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed9c517c55557fb27d1cd0/1626184785488/jokisuvudadevefideraf.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f7f3b1642c6765490d9168/1626862513881/jepojivejazo.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f3fca11434f635472ab9bd/1626602657675/example_of_homogeneous_differential_equation.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee1a28e9cbfe6c2fe54824/1626217000387/tobolejabaxojozusanubuz.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7baae4aaab0286a891b41/1625799342857/syphilis_skin_to_skin_contact.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7cc4f4aaab0286a8a0a00/1625803855205/mikopipumibisax.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7b70a80504e0a776771a4/1625798411034/fubilowotudiseligopigu.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eca74e05183b3b57a0d8b5/1626122062672/emraan_hashmi_and_jacqueline.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f719e45f56992d207bb0d9/1626806756871/king_root_latest_version.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecac4d0f7d8d50062fb0e8/1626123341906/yoshi_island_ds_rom_download.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f141ea4be5f74a98e1ba43/1626423786996/divide_into_separate_files.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e858268f65f47218916ffa/1625839654789/43958820189.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e76ec5441d4a28897ef65c/1625779909767/3d_chess_rules.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f2689b6c177f33d7992004/1626499227995/zazuwozoregapebiwowoxi.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_off0000dedc.bin
116d0f20130d53b8278b284af4d838aa8e37d78527bffed68aabfd80c9c89dce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDC 10624 bytes
font_01_sfnt_off0000f72b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF72B 16792 bytes
font_02_sfnt_off00010f3d.bin
133765ce5d83e485f0d68250ffd9c927369930c1c4fcac90ab6f20a45ae0468c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3D 16340 bytes

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