Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d53b34baf41572…

MALICIOUS

PDF

228.9 KB
MD5: 3b87d68808affac60e225c37eead30aa SHA-1: e8bb62d130bf14bd51480ffde1bc336d7b416503 SHA-256: c6d53b34baf4157262527935537da0d7f67a29b109c402077e78d4fd28a81a24
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

This PDF document employs a typical phishing lure by presenting an image-only interface, designed to trick users into clicking a hidden element. This action likely redirects to a malicious URL, as indicated by the 'PDF_IMAGE_LURE' heuristic and the presence of embedded files, one of which is significantly larger and flagged as a suspicious artifact. The PDF also contains JavaScript, suggesting it's used to facilitate the redirection or payload delivery.

Heuristics 8

  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 228 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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)
  • 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://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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/ResourceRef#
    • http://ns.adobe.com/illustrator/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xfa/promoted-desc/

Extracted artifacts 13

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
67c2ce17d8dbfb3db9d45e51d55724f34395bdcd3a1095443a7d0105e36bc38b		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x18AD4 163 bytes
embedded_file_obj0002.bin
4e13d504e65bdebab4687c1900f230f8682c770e508c57e870ea5ebcba7067a6		 pdf-embedded-file PDF EmbeddedFile object 2 at offset 0x18BC5 2075 bytes
embedded_file_obj0003.bin
8cd6953f31f67721bd87cfbd55288d596d2267df532ca7d0d86aafd49105ad03		 pdf-embedded-file PDF EmbeddedFile object 3 at offset 0x18F50 266170 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0004.bin
7e4c746142c5363dfb2147564dc0d7fabf1236273c9a924813bf104d26134ae9		 pdf-embedded-file PDF EmbeddedFile object 4 at offset 0x26998 2436 bytes
embedded_file_obj0005.bin
ae141e49facea3586813b1134d4b0d89434df0f681bff09d24888bff4a4667fe		 pdf-embedded-file PDF EmbeddedFile object 5 at offset 0x26C95 359 bytes
embedded_file_obj0006.bin
500856001a9edb17a299f41c8b34871c12c85d56ec8eff03ef181fca24bb96b5		 pdf-embedded-file PDF EmbeddedFile object 6 at offset 0x26DB1 200 bytes
embedded_file_obj0007.bin
ec8083be0bbd5e31a08d735751314d86a0a65a2da6bc73ff5b2090a8e18534a3		 pdf-embedded-file PDF EmbeddedFile object 7 at offset 0x26EA5 1533 bytes
embedded_file_obj0008.bin
2ebdd7efeaa1190ff6bad8cbd649b313e3969564018f204e7385b97c2fab1e19		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x27167 80 bytes
embedded_file_obj0009.bin
4a60a9864cdf7382475d51051a03fdc43b32c31eb508893ccfccece34957f9f1		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x27210 56 bytes
stream_002_off000004d1.js
f8721569904600df33f536ddc9f4942717077f9d6c3c4253a8f4de5650fc6531		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D1 1367 bytes
stream_003_off000006b8.js
91ea259764c68d27b8981a339c02d8ea92224ae5c0d0cd0a7c8f3d645d599090		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6B8 902 bytes
objstm_0115_00.bin
a3fa60d391dea923f15945927e6313c4f602bb1b9803c590184bbb3f110a521b		 pdf-objstm-decoded PDF /ObjStm 115 0 obj (inflated) 7344 bytes
font_00_sfnt_off00027315.bin
c29e5b1537bee8c88b3ffca56c5f24a45ec8da374cf9d4c0b4a78d04fc230949		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27315 95975 bytes

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