Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed882086bb65088a…

MALICIOUS

PDF

90.3 KB Created: 2021-07-13 21:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a5b8c0359d733c9946330bc6b54ca4b3 SHA-1: 52e9786defa729d6c3fb80c9e81677c4dde1ca2b SHA-256: ed882086bb65088afc4fc0a7ba6e4ccdfee85ed30fdd1db9047ce3758a9173ee
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://coretry.ru/square?utm_term=use+of+laterite+soil', which is likely the destination for a phishing attempt or malware download. The PDF structure also shows signs of manipulation with duplicate object bodies.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://coretry.ru/square?utm_term=use+of+laterite+soil
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec9abcf6fc466b5bf53933/1626118844438/98825236145.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ece260bc85f73bac20612f/1626137184678/93387449886.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8d53138670b5817c4aa26/1625871665425/hiit_training_at_home.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8c0cf09230f0e1841e01f/1625866447518/16020135230.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e91ee02210ba6bce121210/1625890528638/36049378590.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e908bf66be7e490f0e9f94/1625884863975/country_dance_x.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edaa7a7d02012a3633390d/1626188410492/electricity_and_circuits_class_6_solutions.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e77eb2f0d8276bf8664b99/1625783987019/77601242828.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e92e6b2f3c4128e18ac285/1625894507489/vovadiponoresukedubunaju.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8fad0566ded7d61ab4eb7/1625881297056/48585344160.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8bccf1b56fd057579dc95/1625865423644/the_principle_of_utility_can_be_summarized_as.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eced97f8b4e244e4f7ffdc/1626140055430/how_many_grams_of_sugar_in_a_bottle_of_chardonnay.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7b2469ebc0053f314592a/1625797190716/siwowukidutilikezezekun.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_off00010315.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 16792 bytes
font_01_sfnt_off00011b2c.bin
ff3f9927706878885960ad03bface122deedd840e6f620c6b2ecf2efd23849c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2C 10112 bytes
font_02_sfnt_off000131df.bin
bddd28bdab91c54f66b0ec231a2b38d108432ff035f4c31fbb907b1272872eee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131DF 16636 bytes

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