Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b95fee372a36d0e…

MALICIOUS

PDF

351.9 KB Created: 2010-03-31 10:11:42 UTC Authoring application: Advanced PDF Repair: http://www.pdf-repair.com First seen: 2026-05-08
MD5: 5fedfefad10eb75f743a2a2465c256ba SHA-1: 981b1422d6732b4eb39bc9052fa0409f1915664e SHA-256: 1b95fee372a36d0e5e6adaba3d650da7c60638f7476042b5bb8e1080fa698de6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains an embedded script payload and multiple URLs, suggesting an attempt to redirect the user to a malicious site. The presence of an embedded file further supports a delivery mechanism for malicious content. The specific URLs extracted, particularly those related to 'pdf-repair.com', are suspicious and likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • Suspicious extracted artifact high 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 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
  • Embedded script payload in PDF stream info 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.
  • 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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://www.pdf-repair.com In PDF document text
    • http://www.pdf-repair.com)/Producer(AdvancedIn PDF document text
    • http://www.pdf-repair.com)/ModDate(D:20100406171120+08In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x51 13412 bytes
SHA-256: 374649ca9d248b513cf7adf1fbdefc499c0f5cf754334845fe32496ec9c2fa44
Detection
ClamAV: No threats found
Obfuscation or payload: likely
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 0x574 8642 bytes
SHA-256: f632f5cf755c102a284088dd721c88b615832759ace596b88ffa28f90e8ac324
Detection
ClamAV: Win.Exploit.CVE_2010_0188-7
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: NOP sled, SC_PEB_ACCESS, SC_STR_CMD Static shellcode analysis recovered command string(s): cmd.exe /c temp.pdf

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