Malicious PDF — malware analysis report

Static analysis result for SHA-256 caef302589f65460…

MALICIOUS

PDF

74.4 KB Created: 2021-07-16 08:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5338e2fc28ab02b8990b50bdac6b56cf SHA-1: a96158430f522fe01ee89fd8f1a76824bff77fb0 SHA-256: caef302589f654601421e1e6a672fd713de8a56fc96b1a5298c45f074f4582a3
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 attempt. The PDF contains embedded URLs that likely lead to malicious content or further stages of an attack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8907

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/sq/ugae/~3/qQn0o4eTdIQ/square?utm_term=china+cash+and+carry+montana
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed4ca50124a666ff427ba9/1626164389780/ncert_solutions_for_class_8_science_chapter_4_extra_questions.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f107b615846f0d14e96d84/1626408887128/mp3_music_downloader_app_for_android.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8c4ac4be6b65fb4b10468/1625867436191/52346953840.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee0bf17d49fb55d623648f/1626213362184/logistic_regression_in_r_example.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e81795ba333063f17af04b/1625823125965/an_introductory_english_grammar_stageberg.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0e6dc93f2b300380ac26a/1626400476517/52825813472.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_off0000c121.bin
c5b0388ac3fae89f1a1f04f2754c4c4dab003cf1df3998b1e17929f3c70c0660		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC121 10600 bytes
font_01_sfnt_off0000d939.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD939 16792 bytes
font_02_sfnt_off0000f14b.bin
aba859f3846a3d2c3d5c1b838f7de967ab41b130d4b5e00a1820b7938873a739		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF14B 17068 bytes

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