Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab8e973532a6fdf…

MALICIOUS

PDF

77.3 KB Created: 2021-07-19 17:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 58c9ed2defeea7a07257b2f97458788f SHA-1: 80807e13f5fa887012c800a7bb2e3260a2c969f9 SHA-256: 1ab8e973532a6fdf685c1e0cafd593acd13d204b5614494b038d0406c3dd896d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains multiple embedded URLs, one of which is associated with a phishing detection. The PDF structure also shows duplicate object bodies, which can be used to obfuscate malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the overall malicious verdict suggest an attempt to lure the user to a malicious site or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/X6hrLWyzjlw/square?utm_term=i+am+not+jealous+quotes
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f2b2bd25edf12306535e3a/1626518205586/how_do_you_convert_a_zip_file_to.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee1191588fb5669510edf8/1626214801619/chevrolet_astra_2004_manual.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3b7d7a047b636122944e3/1626585047215/fishing_leveling_wow_classic.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f366906167905317dbe1fb/1626564241124/18861788754.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e85ad426a8d52d112d0f92/1625840340139/how_to_get_free_200_robux.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f5292e2117d935efbb7cd2/1626679598358/78267078226.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f068a0488f8042adabb86f/1626368160533/69073155578.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_off0000cdd7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD7 16792 bytes
font_01_sfnt_off0000e5ee.bin
056a3c805842440c003ba6126d47213400422866c1bb53fcaedafec1be0b2b93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EE 10404 bytes
font_02_sfnt_off0000fd81.bin
0fc352122231af0e5cb0dabff4f031144d5e898d78555979d1e296ad1c0ff675		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD81 16408 bytes

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