Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7a6dc453d60e38…

MALICIOUS

PDF

75.9 KB Created: 2021-07-13 00:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bfe30f306dbea92656dfabb9bb4238b1 SHA-1: 0a046387d46426842056fd13c6a9ad65724d1aba SHA-256: be7a6dc453d60e38b604292b00f9508752c99d66243b549329dbc078e760e10b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. No scripts were extracted, but the PDF structure and heuristic firings point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8972

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/UZrB20b2Dcg/square?utm_term=couples+therapy+worksheets+free
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec92dde07849485499b9c5/1626116829912/lejosajexet.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca4264f2b1c51afa6f313/1626121255106/how_many_people_have_finished_candy_crush.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecb0b382c35958e286934a/1626124467439/old_cat_meowing_non_stop.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecb17f104bab176fa86221/1626124671239/if_you_die_young_lyrics.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e904218ce0e10532d19cb2/1625883681500/zewaled.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e906a827127e680414c850/1625884328997/white_house_appointments.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_off0000c8a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A5 16792 bytes
font_01_sfnt_off0000e0b7.bin
7a6b38b3b5ddc8ea3242a069a402b4dce812056e85fa6c5dd05d57a10016db70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B7 16292 bytes
font_02_sfnt_off00010ac1.bin
a07913fe5cc7f63d7d4dcdf7a916221f37140aafea5ebf971b4057184165316e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC1 10680 bytes

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