Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4963d9aea719666…

MALICIOUS

PDF

108.5 KB Created: 2021-07-20 04:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e3dfd4ddf4a2a51f8634c36d0508e5e SHA-1: af44d12d1620d4008b173043e136a6f507494a99 SHA-256: e4963d9aea71966686bba54fb91cd8be7f78e2b1948c663a55245b7aecc6da2e
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 an embedded URL heuristic suggests the document is designed to redirect users to external sites. Although the document body is heavily obfuscated and unreadable, the embedded URL points to a Squarespace domain, which is often used for hosting phishing lures. The PDF_URI heuristic also points to a potentially malicious external link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/rCno-htTzZk/square?utm_term=doll+in+english
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec77f331b0b43e07e5a295/1626109939900/do_not_take_it_for_granted_meaning.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e91dfe566ded7d61aca4f9/1625890302394/botikukusiraruluder.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f3028526e2e727c25d7b38/1626538629909/49936468183.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f057e66a82526f7611fd8e/1626363878492/general_pricing_approaches.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eca335934d360eb28b5537/1626121014025/funny_high_school_graduation_quotes_tagalog.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f3e9d380d83038fa881685/1626597843804/40945890334.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f436c81ad9bf1c32bc51d6/1626617545057/74803861277.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f5ff4694a4b44309ea2ed7/1626734406623/899467460.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee8d5cb82b304768649791/1626246493089/i_did_mention.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f435291db272198f9fe042/1626617129810/mimoxuzupigozavix.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f2dd948c10a93e50475692/1626529172897/35887014376.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee5e07e03b615e09902c56/1626234375768/pibovefob.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000f017.bin
bd896d5e3c33ac93e690fd2fd84ed8abb1f8b5471a14eadb3c0c6d67812cb34c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF017 21636 bytes
font_01_sfnt_off00011716.bin
db0dbd9fdc2cbd6bb9eab253d676befc2141fe7d120df778980cd9202c4a4d30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11716 10028 bytes
font_02_sfnt_off00012d33.bin
e2237b3fa50e5a611025d9c91bcd4552ceffb377971a4e86b6473b709f73d34b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D33 31880 bytes
font_03_sfnt_off00017ba0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17BA0 16792 bytes
font_04_sfnt_off000193ad.bin
3bf6279a70d8049887a9e6c642182de201e3b260b2824dc597d8c2a4801dff01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x193AD 4272 bytes

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