Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d61805cd1afaf2c…

MALICIOUS

PDF

78.2 KB Created: 2021-07-14 06:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 46b3e3d0dfdfcb5f45aea1359d49efba SHA-1: 78cea29c69ecd2156b89e57556c4f15abe120018 SHA-256: 0d61805cd1afaf2c33ae156d631dd6bf03b6bb712769479f23200a79bb585388
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'garglob.ru' was extracted, suggesting a potential phishing or malware distribution vector. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URL indicate an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9478

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=sunset+painting+oil+pastel+easy
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8e139787dde1a90aa9c21/1625874745828/muscarinic_acetylcholine_receptor.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7a04d0153e73bf8ad8ad/1626110468503/17224866471.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8f9385fa2eb14b90a0387/1625880888419/24205957081.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee1b1164675e3b9ddea63c/1626217233864/kovezebi.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9c83e0c99b3eb2d4cbb6/1626119299588/60074679706.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e88d4257b03b0bf67ae28c/1625853250118/gajipugajigevupomuxi.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee46f8115d504d3a86ffc0/1626228472893/77832648293.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e85fd2b402d36f42289da3/1625841618376/good_weaknesses_to_have.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_off0000cc87.bin
b7f58824751b7a7ef463e6083e99984241307b0476e8d7c8e2c84e090fb5e3d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC87 10616 bytes
font_01_sfnt_off0000e4f3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F3 16792 bytes
font_02_sfnt_off0000fd05.bin
49945405aedbe2cb47ac4b027bad2080db9ff305e557c0c5e85b7087da96c3d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD05 17556 bytes

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