Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b373bd7e74d9b30…

MALICIOUS

PDF

122.2 KB Created: 2021-07-17 18:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4582a5d088200e401f080d59173dc030 SHA-1: 415ddd5a1286d7a84f4ed76c84977cbce0860df3 SHA-256: 3b373bd7e74d9b3072db9a4999533dffb7ede1d38a5f40a81529a36f78a7edbc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains embedded URLs, one of which is a Google Feedproxy URL that redirects to a Squarespace domain, suggesting a potential lure to a malicious site. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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/u8n3KCQdUYc/square?utm_term=claim+victory+meaning
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee4700a005482cc15701d1/1626228480712/giant_cane_toad.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f05907720d396948bcca83/1626364167375/katudovafununononor.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee6198462f394a1e449e21/1626235288773/52512701732.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f22366d416f421c156b074/1626481511105/the_hyperinflation_survival_guide.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7a1b6ad76c09748f4155/1626110492024/xaratisadisomawisasat.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee6b7dfd66ff3739f14376/1626237822052/f_and_p_manufacturing.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7a0220781e4bb11ae563/1626110466536/17349372934.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7dc95f604029b990de8f/1626111433286/57439251703.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e93d58c6623f037f3940/1625876797498/soruzepulipipunewibomi.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f2253dfe2aa53669014e89/1626481982212/salesman_job_interview_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f119dcc9cf4d40000b4ce2/1626413532614/what_does_active_under_contract_mean_for_real_estate.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016117.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16117 16792 bytes
font_01_sfnt_off0001792e.bin
38d23f96d13776414303febd2fa144f34ae6464efca5fa971e4ee5d8d278d8ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1792E 10616 bytes
font_02_sfnt_off00019176.bin
f888b485179fa73f4072e17edb9eabec45fbc4cbbb32acd90c4c6b81052b5b6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19176 18296 bytes
font_03_sfnt_off0001c1b7.bin
d55af33d00621a64fa78a3119b586c4a6f549b103462488129669d2e76334a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1B7 16992 bytes

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