Malicious PDF — malware analysis report

Static analysis result for SHA-256 82272a7c350b7d4a…

MALICIOUS

PDF

79.2 KB Created: 2021-07-14 00:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fee2aa736ce274851a1cb8327a3d7c10 SHA-1: a3bfa3719c39105aa04506a65501a9d22f49b1c2 SHA-256: 82272a7c350b7d4af6b15d16f1ee57397b2c25ad74f5e0247c6aba976d86b6a6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://garglob.ru/square?utm_term=make+the+best+choice', which is likely intended to redirect the user to a malicious site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL and the high risk score indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://garglob.ru/square?utm_term=make+the+best+choice
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec9a07f83a7f26ecd29c94/1626118663151/thevenin_and_norton_theorem_solved_problems.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e87c069304722a091d5f15/1625848838808/simple_past_simple_present_exercises.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed89d4a17c7f1bf005207a/1626180052659/clinical_anatomy_of_head_and_neck.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edc90210369373fd81b167/1626196226768/pinebatidar.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee0702d6548a387fd74afa/1626212098771/tinasizutimodebobaw.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edd023ea8d40126a1a7385/1626198051520/92262324726.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecdc92dacdbe35d622237a/1626135698762/lurejarevisewipus.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60eda9a14325c5343bbad9d8/1626188193300/how_long_does_onion_paste_last.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec85fb12c1416d2f1b28f5/1626113531771/lelurowanakiso.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed20e9c2ef2d11c8d2e734/1626153193594/87435896781.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec8bcaef188817f7e238d2/1626115018923/20022026040.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8f4635ebba154a8fa2877/1625879652356/spoilt_rotten_meaning.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_off0000d39d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD39D 16792 bytes
font_01_sfnt_off0000ebaf.bin
4fd7ac2a2c6410105cec7ed3131ce86e08c46e51b54a2772b60ebbef317e1125		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAF 17424 bytes
font_02_sfnt_off0001192a.bin
9b644928f1b7fc50e8137374de057e9ec826a381f6de52e80d5152b3dbfbe71c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1192A 10300 bytes

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