Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca72629dcdc68a05…

MALICIOUS

PDF

77.8 KB Created: 2021-07-16 12:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3036b3dc151a663150841d150531461 SHA-1: 20d5ee40af57e43d34bd921eb8156922d981f3a5 SHA-256: ca72629dcdc68a05d4234a8350a2cc03a3f355632af62ae59559aa92d8f36066
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. An external URI pointing to 'inwebjor.ru' was extracted, suggesting a phishing or malware distribution lure. The document body was unreadable, but the presence of embedded URLs and the overall detection profile strongly suggest a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://inwebjor.ru/square?utm_term=emotion+focused+therapy+techniques+pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed9759262c1d401133f26f/1626183513895/all_i_want_is_christmas_with_you.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7d978bb04542cee3e700/1626111383274/28202655888.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee0ad20981f365859e334b/1626213074593/75731408468.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eddcd4a50f6e33a323f754/1626201300512/sasibalopeviboz.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f08da8ccbe6b5168fd5f95/1626377640853/astra_theme_footer_widgets.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d868644c9b4de7f336e2/1625872489019/oncology_in_clinical_practice.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0c6acd1d8e65aae81391f/1626392236117/pentagon_sacred_geometry_meaning.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edf0f5d6ef6771c1dde549/1626206453717/60266153224.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8c5ae0914637f38b6b08/1626115162523/how_to_edit_that_is_password_protected.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8207ca3609a707baeea89/1625825404874/trigger_point_123movies.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_off0000ce17.bin
806ec783f2998916680290996952d5c90960bff4385924861c4f26f97b0dc7e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE17 11184 bytes
font_01_sfnt_off0000e7d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D8 16792 bytes
font_02_sfnt_off0000ffea.bin
06b8fe3c9f956d1d8d09f418869558dbd139650c53f7e1ce8a4ec55c0e9e52ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEA 16128 bytes