Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a138fbac8f8bf8…

MALICIOUS

PDF

80.7 KB Created: 2021-07-17 18:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b51c152968a20b1019d4d9b7025cdec5 SHA-1: 9a35094aac9448ffcb9b6507ce126b4b3a9f210e SHA-256: 60a138fbac8f8bf8ac2793a6fd9f4498a465a78dbfb127f586e3304056381cf3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, though many are marked as benign, suggests an attempt to lure the user to external resources. The document body is heavily obfuscated, preventing a clear understanding of the specific lure, but the overall context points to a phishing attack.

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/iXsW93xxTQA/square?utm_term=turabian+chicago+style+paper
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec90de4f558d0bf39cd5fb/1626116319054/watch_the_adventures_of_robin_hood_1938_online_free.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e9204b8fb24157da70075e/1625890891134/lonetiloroviramosimat.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0df88de4abb1f439198cc/1626398600298/how_to_install_fortnite_on.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0a715dd400b59350bef20/1626384149723/cbse_11th_chemistry_book_download.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec960658d864752e029fc4/1626117638464/93336845398.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8d37cbf13e579204bae02/1625871228164/snow_leopard_in_snow.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d6c3a5e1975eb3931776/1625872067653/normal_hematocrit_for_men.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee0b247c5bce1f3348dd0d/1626213157222/49011828909.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8d00f4b4775d049fdca4/1626115328444/the_most_dangerous_game_character_traits.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee6faa2af4c01978ffcf1c/1626238890995/b_arch_degree_meaning.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0d5eee7c78223958435d1/1626396142654/the_transfiguration_for_kids.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f086ef8424ee64a06ceedb/1626375920958/1525769477.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee6dfcdf3d323292d38479/1626238460335/lamb_mince_puff_pastry.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f070a7f3478d215cea8631/1626370215818/scales_to_play_over_dominant_chords.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_off0000da50.bin
a8800243bded1cdcbed707953b8d0da3443b84409cf0526575f38e9a153cc43a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA50 16524 bytes
font_01_sfnt_off000104e6.bin
83b43a5e4368cc9f1129d4c5b505413801a4038f29bee34979b724e9af90392c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104E6 10968 bytes
font_02_sfnt_off00011e26.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E26 16792 bytes

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