Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c19cec01ac6811…

MALICIOUS

PDF

80.8 KB Created: 2021-07-21 02:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c39a13cb99f4b32eaca0ee01fb9650ec SHA-1: cb41a56edc63ebd72b25fb1f63d0250b84d32dad SHA-256: b7c19cec01ac681102c66c467403eca72f059bba3027b212054b773892a3b118
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. The document's structure and embedded artifacts are consistent with a phishing lure designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8584

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/qI_NY8u86tA/square?utm_term=that+sounds+great
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f6a37ebe9eb8768f0ccde4/1626776446468/bill_of_sale_word_template.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f1e3a945835164159d2566/1626465194084/general_principles_of_ethics_in_psychology.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3f758c2d40e67ec111fa2/1626601304734/how_to_get_friend_guard_clefairy_sword_and_shield.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f1bd173ebe6535ba6dc916/1626455319550/tamil_hollywood_movies_2020_free_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f03f65874a183f1c443004/1626357605456/netboom_download_for_pc.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee0af4b82b3047685c7077/1626213108366/kigimavevoxef.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8a7313c197e145b25b701/1625859889299/consulate_meaning_in_tamil.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_off0000da90.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA90 16792 bytes
font_01_sfnt_off0000f2a7.bin
d2efa190963d9df9d85050046ba69bd81eb50a13f9118d4b0b77c6370c9b356a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A7 10452 bytes
font_02_sfnt_off00010a24.bin
2eee498097e15aacde8a5299576dcfa8267c0708610d6e71c91eac93c53b0f50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A24 17136 bytes

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