Malicious PDF — malware analysis report

Static analysis result for SHA-256 b224fc9c5d9ed4c3…

MALICIOUS

PDF

79.0 KB Created: 2021-07-16 00:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 064008a7b0d29e911b5798184368638e SHA-1: 5614d1cb51562d90b5270c60c81ed7dd51d82dab SHA-256: b224fc9c5d9ed4c3735a84d1e2c9894ce004fb461f279366f530063adbae754e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, although many are confirmed benign, suggests an attempt to lure the user to external resources. The file's structure and the detection names point towards a phishing or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/~3/5Aj-mlxkUx8/square?utm_term=green+tip+hollow+point
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed8fc0f8b4e244e400533d/1626181568225/how_many_right_angles_does_pentagon_have.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec81bdf89f8e700bf7298d/1626112445363/84409102403.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee68e484a0477e84adf440/1626237156135/class_6_all_book_download.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e927b8563c1506a8b668ad/1625892792901/95739010859.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edad687daf0c15b06ae28e/1626189160690/game_of_thrones_ascent_reincarnation.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec88b67e2b6271615bef64/1626114230874/fijuwodabotemumopodebed.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecd208526e290873849625/1626133000307/bukewimamugalanamizow.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0a4697d85083f3bf03a69/1626383465501/good_manufacturing_practices_food.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0a10fb45d123851cce973/1626382607474/zifebodazebilimedewu.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f061712d6c5d0b43d998ba/1626366321597/37029394334.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0a4d0ed8b8a523b8b81ef/1626383568391/40399728358.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_off0000d45c.bin
0da591786e4367ebc5f0b0ced74c3adbe8084c043cb6784866d0fa9e307e7cb9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD45C 10144 bytes
font_01_sfnt_off0000eafa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFA 16792 bytes
font_02_sfnt_off0001030c.bin
8be396dd5f849190c893d7218321f9e5a22ec956c80814fd65c46f9684bdf57a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1030C 16604 bytes