Malicious PDF — malware analysis report

Static analysis result for SHA-256 850e0f9932283c36…

MALICIOUS

PDF

45.7 KB Authoring application: pdf-parser
MD5: 4208e8d9aa8d1f51581b6fa375d7b342 SHA-1: 483fcd080a7107e5d8cfebba17d86397a9586d55 SHA-256: 850e0f9932283c368ea38bd179d37284c40acd49ea745cea079114bf0acf9597
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV and ML classifiers strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content, aligning with a phishing or content distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://postacuteepisodes.com/uploads/1/3/0/6/130639038/rezukemodogem.pdf
    • http://littlebigpad.com/uploads/1/3/0/2/130272898/wiraru-samituwoxor.pdf
    • http://swanmartialarts.com/uploads/1/3/0/2/130272501/pokebirudesifila.pdf
    • http://regencydecorators.net/uploads/1/3/0/5/130545998/zutaxe.pdf
    • http://camerasquare.net/uploads/1/3/0/8/130815437/dolad-rosadosejosol-vakifosu-zetozilogipade.pdf
    • http://www.kenyasklosset.org/uploads/1/3/0/6/130622084/repunupo.pdf
    • http://calvarydifference.com/uploads/1/3/0/2/130271002/vimonok_poris.pdf
    • http://independentowneroperator.com/uploads/1/3/0/5/130541552/nivemed-nodopaju-suzetiv.pdf
    • http://woodlandelementarycoachhughes.com/uploads/1/3/0/2/130273872/fotijufokewise-luxote-zowaxo.pdf
    • http://biexecutive.com/uploads/1/3/0/7/130739478/4624214.pdf
    • http://www.namislv.org/uploads/1/3/0/9/130970022/a2a8fa0.pdf
    • http://medmalneverevent.net/uploads/1/3/0/5/130589429/gowozerulikeluvaxox.pdf
    • http://www.tairuabackpackers.com/uploads/1/3/0/7/130739049/9451e6c17bb63a.pdf
    • http://hotelfullerton.devsite-1.com/uploads/1/3/0/8/130813635/130813635.html#adrenal+gland+blood+supply+radiology
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004421.bin
b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4421 16036 bytes
font_01_sfnt_off00005b11.bin
be03fc61c90e6512314483f3f5968f563a13ae10c74e2c1d05a363a99283e9b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B11 7544 bytes

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