Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0ca814c60180bc…

MALICIOUS

PDF

89.9 KB Created: 2021-07-13 14:39:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ecaa86860348b890386e6b3db2ebe43c SHA-1: 0a05bede25598c2b3f6f6074b44b86a9c5f8744e SHA-256: cc0ca814c60180bcb7a80141ae8ecad00992f1dc22fd655c1a08b617e3e233ec
66 Risk Score

Malware Insights

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

The file was detected by ClamAV as a Pdf.Phishing.Trojan, indicating a malicious intent to deceive users. The presence of embedded URLs, though currently flagged as benign, suggests an attempt to redirect users to malicious sites. The PDF structure also shows signs of manipulation with duplicate object bodies, which can be used to hide malicious code.

Machine Learning

  • Nyx PDF Classifier clean score 0.0812

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/AG-UZpNbJGc/square?utm_term=who+wrote+the+book+philippians+in+the+bible
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed29f29db072196a1f6ad6/1626155506529/life_after_ectopic_pregnancy.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8bd13f311dc752b09c77c/1625865491166/zovivabimiriwu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000e29e.bin
9229bde5e3614c940ebb387a6affb910e6b09cdb82f6b0ab59768fbd23138caf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE29E 16244 bytes
font_01_sfnt_off0000f88f.bin
7f0234a8659d0226655dcf637b57d6799ba513f06273456e3fe257bed26f73e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 10660 bytes
font_02_sfnt_off000110c6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110C6 16792 bytes
font_03_sfnt_off000128d8.bin
93c0ab7971dfa8f0c869504eddeea448ad0bf426d263748c14a9ba3bc2f3b223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128D8 19520 bytes

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