Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab155d3909830c51…

MALICIOUS

PDF

82.9 KB Created: 2021-07-18 08:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a14bc875fa31c3ec5194c4ec6c0fe6d5 SHA-1: 2700dd185da1b1eb6a7717220b3189ea63229fd0 SHA-256: ab155d3909830c51867ee73542431c2913fd155cdf00a43de8f1f46a710348d8
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded URLs that likely serve as lures or redirect to malicious content. The presence of these elements suggests the document is intended to deceive the user into executing a payload, fitting the pattern of a phishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/UkUWPC8UKDU/square?utm_term=we+will+rock+you+l
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e809b5efb14d11221332d0/1625819573166/what_is_the_will_of_god_scripture.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e9121937cb9044755f69d4/1625887257647/definition_of_radiometric_dating_in_science.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90ff0e6a58043b690de48/1625886704174/dabadowimubegupibovipokas.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f082e640a5bc6c0f773178/1626374887076/sozetuko.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e85f538e931b5399c026a1/1625841491105/are_subsidized_loans_better_than_unsubsidized.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee1dde27fa864c7d0f4ac5/1626217950995/how_do_you_download_fortnite_on_a_laptop.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7df5d7e45264421f8dcf6/1625808733833/automatic_hyphenation_in_word.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edd7fae83f616bcf81f95b/1626200058271/14514065772.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edfb25a0f2ca3483d555e1/1626209061893/92351658207.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e76ec5441d4a28897ef65c/1625779909767/3d_chess_rules.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eda1b8c2b60e0ed5b54c49/1626186168854/vorasagogowofo.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e79a314aaab0286a871d91/1625791025390/what_is_the_collective_noun_for_robbers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f2423f29712869f05bb32f/1626489407448/spring_security_token_based_authentication_tutorial.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e84cf830ecfa0852d53c68/1625836792684/3358748827.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_off0000e250.bin
db956e8651d3d81760380c5bf9ae3f4871016a9d2d251320d8925aec87f140c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE250 10076 bytes
font_01_sfnt_off0000f8e2.bin
9592903b2f683cccaeb5bc2a53d171da1b4d86ec8ed12a22f936812d05b1f2e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E2 17612 bytes
font_02_sfnt_off00012744.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12744 16792 bytes

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