Malicious PDF — malware analysis report

Static analysis result for SHA-256 41520ea674220639…

MALICIOUS

PDF

80.5 KB Created: 2021-07-19 00:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ade78a38863699d9f308fdab131791f7 SHA-1: 47b11798ae894e429cf99c3175fea6f9e53b7028 SHA-256: 41520ea67422063966c5ba86aa5db01cd99d46db9a44e6f1add463f9e6cc1640
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, one of which is associated with a phishing heuristic. The document body is heavily obfuscated and unreadable, suggesting it may contain embedded scripts or exploit code designed to redirect users to malicious sites. The primary attack pattern involves luring users to external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aauXj3bnHUA/square?utm_term=filmywap+apk+download+for+android
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3381b6678663e6a2f18d4/1626552347710/the_many_benefits_of_chocolate_milk.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f2005a95bdf8785a4f5e78/1626472538253/70160820888.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f332139c7c9f0ea998edeb/1626550803496/hillyard_cleaning_companion_c3_manual.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2c05736db646251996af1/1626521687685/types_of_work_related_stress.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f49a01689a653fd2a5935c/1626642945918/3019592059.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed943b5d4dee687f47cc4c/1626182716041/didumifasod.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eda593f827c554fda0845e/1626187155306/faq_about_time_travel_2.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed7c7966c2900cf561873e/1626176633265/solinixizenawemo.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee275a1f51426150cb8efb/1626220379047/level_88_on_wordscapes.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec88800d838b6c850d6e9c/1626114176971/29457192207.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f49fe3d9389f5e809c5ad2/1626644451431/simple_pencil_drawing_step_by_step.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f49f4181f38b2058953e77/1626644289442/22313153244.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f49c7c699a8678c5897f87/1626643580345/51881950804.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee66e4df3d323292d32c40/1626236644361/sorozulasoded.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0230fa9bc231ac1d0b93f/1626350351708/8049982661.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_off0000dbe4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE4 16792 bytes
font_01_sfnt_off0000f3f6.bin
927d4cc55b17e2d4bdad4bc98492e3ba699948f5d4411b6c23949658d2c4efe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F6 16212 bytes
font_02_sfnt_off00011dd1.bin
3a026aaa12f89d10e440291ef4242b33f39985b99b4dc7ba4d9820a6716a3911		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD1 10532 bytes

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