Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be7661c56b9993b…

MALICIOUS

PDF

96.8 KB First seen: 2026-05-10
MD5: 84836ac59659c85eab6d6d51dfbda5c0 SHA-1: 45fe4d57630b5c9b8cf0550be64f6152b1b53f0e SHA-256: 7be7661c56b9993b8be0908042406a8ba8e09495910981d6e23a0b37ceab8980
244 Risk Score

Malware Insights

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

The PDF file contains obfuscated objects and triggers the CVE-2010-0188 vulnerability related to XFA forms and LibTIFF. This exploit is known to deliver shellcode, indicating an attempt to execute arbitrary code on the victim's system. The presence of an embedded file further suggests a downloader or dropper functionality.

Machine Learning

  • Nyx PDF Classifier clean score 0.0644

Heuristics 9

  • Adobe Reader XFA LibTIFF integer overflow — CVE-2010-0188 critical CVE exact CVE_2010_0188
    An XFA image field carries a TIFF whose IFD has a malformed tag that overflows the LibTIFF parser (CVE-2010-0188).
  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • Hex-obfuscated structural name object high PDF_OBFUSCATED_NAME_OBJECT
    A structurally-dangerous PDF name (e.g. /OpenAction, /Launch, /AA, /EmbeddedFile, /SubmitForm) is written with #XX hex escapes to evade string-based scanners. Legitimate producers write these names literally; hex-encoding them is a deliberate obfuscation technique.
  • 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
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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.
  • 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/xdp/ In PDF document text
    • http://www.xfa.org/schema/xci/1.0/In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.4/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text
    • http://ns.adobe.com/xtd/In PDF document text
    • http://www.xfa.org/schema/xfa-form/2.8/In PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x88 13408 bytes
SHA-256: e335b54a6d4a8f5209547c4c81c04aa795e6c280fc614ce12bf19ae51e8aaef5
Detection
ClamAV: No threats found
Obfuscation or payload: likely
103 of 177 identifiers look randomly generated (e.g. 'MX9BhG8U2FZtxx0xOa3dia1lERXUzYVFnMjlMeTR') — consistent with name-mangling obfuscation. Carved artifact contains 1 long base64-like blob(s).
xfa_image_rawvalue_000.tif pdf-xfa-image-tiff XFA image/rawValue TIFF payload near offset 0x5AD 8642 bytes
SHA-256: 14bf1b0d644a1c8481ac5fc98c5d8bd89f5c1d93985293d98b32b1b771fadcab
Detection
ClamAV: Win.Exploit.CVE_2010_0188-7
Obfuscation or payload: unlikely
icc_00_off0001741f.icc pdf-icc-profile PDF ICC profile at offset 0x1741F 1320 bytes
SHA-256: eb03db58ff1f226c83103a11f30b5520f9b68a7ced67daa78992723e3ea0411d

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