Malicious PDF — malware analysis report

Static analysis result for SHA-256 de565d96220dde95…

MALICIOUS

PDF

82.0 KB Created: 2021-07-17 05:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54d037285cc53c3069677944790a22a6 SHA-1: 70f1e4693884ba0addf81de6d7fb2d0ce0cbb4a5 SHA-256: de565d96220dde956fbf05c31eaf9dd8eb37dd43d69b43b9788695754c1e8cfe
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains an embedded URL that, while currently marked as benign, is likely part of a phishing or credential harvesting scheme. The PDF structure itself is also suspicious, with duplicate object bodies, indicating potential obfuscation or malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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/razvivatel/yapz/~3/4Ji06Fp1PxY/square?utm_term=middle+high+school+meaning
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7ed854a52c186ce46f45/1626111704559/fast_and_furious_supercharged.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec91ad0f7d8d50062ce82f/1626116525765/new_spring_wot.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee90cd8e3fff2bd3c4b46e/1626247373208/zawamogawajegawasug.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecaa639cb57f380a7b5da1/1626122851325/it_is_also_called_the_cardiovascular_system.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e932ffb9b95949b65f5200/1625895679285/riwerezudurelurod.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f242401ad9bf1c32a92869/1626489408141/wolf_ms24_installation_manual.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ede2c16d720f75fb61146a/1626202817766/being_vague_on_purpose.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f09bdf7716723b56046543/1626381279476/jowurerekakodizukujomizur.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee76d07dee9f188f7bc739/1626240720513/38364991784.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eca4633080d76c7a53fcca/1626121315206/wekigolunenutadetexuzid.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0954c9613666e1abc5c58/1626379596508/talipuk.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_off0000e17c.bin
90bfbc02a63ad78e42bce1332350fb2620af07657670a17b16115f6e1edbabd7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE17C 10612 bytes
font_01_sfnt_off0000f942.bin
27491f138131ddd0c1e2abe3ad6d304c186673956d9023461a5e7e61ec130677
pdf-font-stream PDF embedded font (sfnt) at offset 0xF942 16500 bytes
font_02_sfnt_off000123c6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x123C6 16792 bytes