Malicious PDF — malware analysis report

Static analysis result for SHA-256 85381b026c8fdf0f…

MALICIOUS

PDF

80.7 KB Created: 2021-07-20 19:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1bdf811354b14d05aa9f48499ce2ef92 SHA-1: ae3009beed5fcc7fa4925e4beb7de9c69e484312 SHA-256: 85381b026c8fdf0fea05c5498bd2c291470327c4c6a6b491f4d735bc40c2fe01
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a social engineering attack, likely aiming to trick the user into visiting a malicious site.

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/um1bUVUAM38/square?utm_term=the+new+market+wizards+conversations+with+america%27s+top+traders+pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee03309942ff19c76b4498/1626211120803/write_an_application_to_your_headmaster_for_leave_of_absence.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f2ca9b25edf1230654195a/1626524315323/the_goddess_of_wisdom_and_war.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f08e8161eeee46ea2a0f9a/1626377857215/43231402298.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec92ef7d354a5e86a43641/1626116847511/66357220666.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0c67d5d599800102984c0/1626392189759/how_to_unprotect_a_document.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f5d9f51a87bf21672e4a15/1626724853722/40297205321.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8f713f229ba2ea8354e72/1625880339346/sozirikubuxezuzukov.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9077a2c5c2f6215c80511/1625884538140/75496730427.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e81164a3609a707bae4a9b/1625821540237/how_to_enable_flash_player_for_chrome.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e924c40a287971af9a1bbc/1625892036384/zubuj.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f4bc11ac778402357b4257/1626651666127/15348909064.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7e32081471576eaed4646/1625809696277/68038453442.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e89ecf274c81388b7840ca/1625857743910/58961775875.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee41471f51426150cd5c7d/1626227015826/blueant_s4_user_manual.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_off0000d6fd.bin
1bd0c82946257540226a399fbe2c850b5a0d5fd2e036697ee2ce9f574346beff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FD 11140 bytes
font_01_sfnt_off0000f0f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 16792 bytes
font_02_sfnt_off0001090b.bin
413c709d1ce53a39a459d358eabf6b756454efe798d87b2b34b8fcd3997a7899		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1090B 17016 bytes

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