Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f0170608cfe7f4e…

MALICIOUS

PDF

162.8 KB
MD5: 7598e79197505ef3f80f68bb89d8328d SHA-1: f707b986f71d8e62673e9468804cfed379d71d45 SHA-256: 6f0170608cfe7f4e1e8cc3381514f31c2a96ae069972051b6c671c08287295d6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains JavaScript within an XFA form, which is a known technique for exploiting PDF vulnerabilities. The critical heuristic 'PDF_JS_EXPLOIT_CLUSTER' further supports this. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, as indicated by the 'EXTRACTED_FILE_STATIC_TRIAGE' heuristic flagging a suspicious encoded blob. No specific malware family could be identified.

Machine Learning

  • Nyx PDF Classifier clean score 0.0844

Heuristics 7

  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic (matched inside decoded stream)
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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 http://ec.europa.eu/social-security-directory/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/g/img/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/xmp/InDesign/private
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xci/2.8/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://www.xfa.org/schema/xfa-locale-set/2.7/
    • http://www.xfa.org/schema/xfa-locale-set/2.1/
    • http://ns.adobe.com/xtd/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/
    • http://cgi.adobe.com/special/acrobat/update

Extracted artifacts 19

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0006.bin
f7ee3ef2f8f35d669a6c2b8b0b0ee89655bbc3d04b107a8d22531830f6fc28a1		 pdf-embedded-file PDF EmbeddedFile object 6 at offset 0xB773 86 bytes
embedded_file_obj0007.bin
44f777708d01d8ab19c2f3a2285ab58b963adbfc93c3c120f228965ade50ca6a		 pdf-embedded-file PDF EmbeddedFile object 7 at offset 0xB826 1510 bytes
embedded_file_obj0008.bin
7253870c4d2af43807cb03d69fd493d934b753c15ac9513a7fad17e1790eea54		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xBAFC 11794 bytes
embedded_file_obj0009.bin
e6efd8dd9aac3633632107e9a6b43f6d5a373b70a3b617da773b6e224e39646e		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0xC341 460 bytes
embedded_file_obj0010.bin
c2c9679605620007f3dbf29accd072b75dc4eb66dd4e3a337b290939b584746b		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0xC493 5720 bytes
embedded_file_obj0011.bin
4cb349134bdb5f1a1c03281df9b53128ebe947f235398a912a4f0a9f638b24d5		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0xC946 200 bytes
embedded_file_obj0012.bin
8e7749cf60ad6a8d3ad642e0a1854ce7f4ad916e59e8e107292596981c888710		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0xCA3C 98323 bytes
embedded_file_obj0013.bin
2ebdd7efeaa1190ff6bad8cbd649b313e3969564018f204e7385b97c2fab1e19		 pdf-embedded-file PDF EmbeddedFile object 13 at offset 0xFA34 80 bytes
embedded_file_obj0014.bin
4a60a9864cdf7382475d51051a03fdc43b32c31eb508893ccfccece34957f9f1		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0xFADE 56 bytes
stream_002_off0000046e.js
f574e4d51594d1a8fd22e125b109b827c437aa898edc78babb62dbb93f8744f8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46E 1532 bytes
stream_003_off00000659.js
4a1aca004cf20431c9a66dce85404a6411a54d881a6c257882260ffc972a13eb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x659 870 bytes
objstm_0069_00.bin
a0c7236fed75f9bd117511fafb03279cd3b014a91e86b224c1cd0a72b2795ae0		 pdf-objstm-decoded PDF /ObjStm 69 0 obj (inflated) 12148 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).
font_00_cff_off00005258.bin
3c68dc42febab880457662e5b29b9fdc287123ac4ed62119babe8a5b97b560e5		 pdf-font-stream PDF embedded font (cff) at offset 0x5258 4609 bytes
font_01_cff_off00006c2e.bin
79df8dcf44e4ab685724d72530807c7178e014e5db5daa7a020a2795ee93918e		 pdf-font-stream PDF embedded font (cff) at offset 0x6C2E 2477 bytes
font_02_cff_off00007510.bin
a236fc8d89f1895cf20a68bc7addf2cfcdd439871193bc002f7f076ce44040f9		 pdf-font-stream PDF embedded font (cff) at offset 0x7510 1738 bytes
font_03_cff_off00007b8e.bin
8529d1563b466d7c7b9fcd77f16c8c995db98f5347e34ad45209ab1bd1d08ffe		 pdf-font-stream PDF embedded font (cff) at offset 0x7B8E 708 bytes
font_04_sfnt_off00007edd.bin
5d3ca7c964c84e3ba9d6577a43d003b5f34954437a016d1c6387aa7d74e29751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDD 6187 bytes
font_05_cff_off00008d38.bin
3923c1bfe098a7dea9ca8d4fe2afe52c6653986750356883ed181d6d5f7e9574		 pdf-font-stream PDF embedded font (cff) at offset 0x8D38 3417 bytes
font_06_cff_off00009b87.bin
9fcf634e0083182d90f529a4507e6244a7acef479c78162d8fd2c84c829ecce5		 pdf-font-stream PDF embedded font (cff) at offset 0x9B87 2401 bytes

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