Malicious PDF — malware analysis report

Static analysis result for SHA-256 313bfa3430048135…

MALICIOUS

PDF

94.2 KB Created: 2021-07-21 16:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 785f14af9e73f9d5738d631f98735a97 SHA-1: f24d708d51644b6a162d13fff0b56bdf76409507 SHA-256: 313bfa3430048135fc6839c847b034aa4124c321f2775765e630da0a5e709a38
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier, indicating it likely exploits vulnerabilities or employs social engineering. The presence of embedded URLs, though many are marked benign, suggests an attempt to redirect the user or download further payloads. The document body is heavily obfuscated and unreadable, preventing a more specific analysis of its lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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/~3/0YvHz_IItD0/square?utm_term=black+paper+for+goodnotes
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f128b3ff43f80544523acc/1626417331507/rozal.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60efded9a9bc231ac1cdc70d/1626332890063/how_to_make_windows_keyboard_light_up.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eddf55bf52576c6247351b/1626201941272/59112006128.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e78f02d93aeb546a0ff998/1625788162819/if_there_was_vs_if_there_were.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f5b2c4cc738d782bbb55f6/1626714820600/beck_depression_scale.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f4e04923bf9c1bcaf912b4/1626660938016/1738836779.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f5c34e605d87260e89f82d/1626719054935/personality_type_questionnaire.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1ef9543f7b9065f707e21/1626468245998/75047060512.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f2a4ad27519501fc0a724e/1626514605685/when_to_use_present_tense_in_spanish.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92bc92f3c4128e18aaf11/1625893833091/how_to_remove_mugshot_from_internet.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f5f94c562ded26533d35a7/1626732876176/cold_induced_bronchoconstriction.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edd4339942ff19c7665525/1626199091830/levevisuzez.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee3aa9ab0cb8743be4512a/1626225321461/abdominal_paracentesis_adverse_effects.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8d4745ef51a130ea0d53a/1625871477088/gapuvadetekutunuzilejatig.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1a993adfb1a37a8b9acf4/1626450323513/rebiworutikox.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f21c6f1ad9bf1c32a758b9/1626479727887/any_to_cad.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec98861d0b39337552d68d/1626118278543/nokoxugukevuraxazubaxozed.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7da00cf33f708d79bedb/1626111393018/michael_connelly_best_novels.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed87fc094bb21e99962904/1626179580452/is_slime_a_solid_or_liquid.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e98b.bin
ba675951fc3e53a3ea92150aefc66ef9706896971d0c2b94545cd533e7012270		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE98B 10848 bytes
font_01_sfnt_off00010293.bin
e489482729bf08e13e5a77f4655a5d32ace94e00c9f0f764f010ed4c078dfb7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 16656 bytes
font_02_sfnt_off000119a1.bin
61c778e14f76f12b51ea4ef48f74f6d60dbd702a54b5a15729c753d3ed65420d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119A1 17800 bytes
font_03_sfnt_off000147b1.bin
9c3c50ca7885eb1b87261f6f74ba185aca171ae216209544253fbc3ee3acc073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147B1 1720 bytes
font_04_sfnt_off00014fd7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FD7 16792 bytes

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