Malicious PDF — malware analysis report

Static analysis result for SHA-256 61cb7c537fb045c7…

MALICIOUS

PDF

80.9 KB Created: 2021-07-18 23:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9567bb804e75bc9eccff21b5a21356ee SHA-1: fcb56e21ad938349bbc279466650889dd73a0d36 SHA-256: 61cb7c537fb045c7da25fd6d17056d90bf813db07b5d657ff023cd5c3c19ea67
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware delivery attempt. The PDF contains embedded URLs, suggesting it may be used to lure users to malicious sites or download further payloads. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8896

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/razvivatel/yapz/~3/gOBB6uaVNRA/square?utm_term=types+of+globalization
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0dea0a57b467a228cad4e/1626398371055/spanish_words_that_start_with_e_to_describe_someone.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f3061d4b68c137e697c0f9/1626539549857/85333500050.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f228e30daf9c1dca13854c/1626482915962/ava_elizabeth_phillippe_little_fires_everywhere.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7955728bb5f4f515f176b/1625789783510/32266495204.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e79e0df29cd6423db0f0a3/1625792013277/top_energy_companies_in_the_world.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee01f28e89d93564d8cb7a/1626210802166/how_to_put_multiple_into_one.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f42f861ad9bf1c32bc0ddd/1626615686953/39685355237.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_off0000dd6e.bin
02db63cfbc06f608dc137b7356d21bf7cea5d28ba9a97ec92558f6606021a44e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 10708 bytes
font_01_sfnt_off0000f601.bin
cd2f1d41d7551a969cd1aecb90a19e901be3e3597859abb6d0920f34a23209a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF601 16180 bytes
font_02_sfnt_off00011fde.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDE 16792 bytes

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