Malicious PDF — malware analysis report

Static analysis result for SHA-256 c683259f7ccc4c3b…

MALICIOUS

PDF

76.5 KB Created: 2021-07-20 08:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c2f182a4746b6f48a5a1d193d32182c9 SHA-1: 3e72f52497710105ff0f6047fd52f4df77788afb SHA-256: c683259f7ccc4c3beb214d0ee78724cc385a82c1d2ea5eb4050f65bcf8d55c46
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 trojan threat. The presence of embedded URLs suggests an attempt to redirect the user to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing or malware distribution vector.

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=parallel+operation+of+shunt+generator PDF link annotation
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e9587fb132fa3620751f99/1625905279574/monopoly_board_game_classic_about_real_estate_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f00ec108697753172fcda3/1626345153602/kaverarutamol.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7d8d402743737595d253/1626111373448/the_bible_project_reading_plan_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7e1bc3fb560d26f252a4/1626111515852/13200341795.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edf8f3afeffb59e674cac3/1626208499600/convert_to_word_for_mac_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f3b913cba7b71501eade3f/1626585363991/nupipumipiborutefovalin.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE489 10736 bytes
SHA-256: d58a847eded5f401ecb30b2af28cd88ba2d9cc154d8c139d5f3ed670b2b966d8
font_02_sfnt_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 15784 bytes
SHA-256: faffb6adba533cc65cca35fec655feb3da17824c9d780aa5e978a3c8225d9e61