Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d941c6d64ada56…

MALICIOUS

PDF

74.2 KB Created: 2021-07-17 08:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd89731c9457fc24661d7bb0aea5cad0 SHA-1: 5474f16a71240be0e1bc9746421568a6b395d3aa SHA-256: a2d941c6d64ada567fafda6827d17f67b89a4979f2bfa15215932a9bd4c4ea5b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded URIs that likely serve as lures to download a secondary payload. The presence of embedded URIs suggests an attempt to trick the user into navigating to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/iXsW93xxTQA/square?utm_term=catapult+construction+quick+guide
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee32607c5bce1f334c2c52/1626223200590/methanol_lewis_structure.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e862960d8cfc12a11f1d52/1625842326969/nelidaxaxiwaruke.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e85083dc22a026a116e907/1625837701711/two_circles_are_congruent_if_they_have.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee2c95fc191471fc6b5a3a/1626221717986/rufus_for_win_10.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee5cdcfd66ff3739f06acf/1626234076322/77831660487.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f03e6c4980ba6b3b7258ce/1626357356233/largest_northern_pike.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0f31ce013e242e711780c/1626403612086/peselexusipixipo.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7daa2de985067772db6d/1626111402755/63874842411.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee245bf6c772366d2c4a6d/1626219611374/89597435525.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f17df6f32be22f007a46ae/1626439158633/fig_trees_of_the_balearic_islands.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8f26c320dbd0de27f36eb/1625879148602/the_word_for_you_today.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efd02096309e3685a8ba8d/1626329120319/full_hd_mp4_bollywood_movies_download.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed1ea2ff6d86145b9cdf1d/1626152611333/class_10_english_subject_question_answer.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_off0000c2ab.bin
9253cec360731a3d60b4d2e3c8d5ef62033b6f5fb2256faf6d3369ae1aa842d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AB 11056 bytes
font_01_sfnt_off0000dc11.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC11 16792 bytes
font_02_sfnt_off0000f423.bin
4fa6e343322779a26f697461b3e23a5faeb4e669a9dbd2f5d35a321f871eeba7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF423 15608 bytes

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