Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66cacedf3a94804…

MALICIOUS

PDF

61.6 KB Authoring application: Soda PDF
MD5: b1dce1fd847bc8780f92b594d257a740 SHA-1: e9f0a967d8a02de28e79667cc09af3f40f067b63 SHA-256: c66cacedf3a948045ab1e20c1ac9a0e38e404d859fc605ee1e2511737573e0cf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs pointing to external PDF files hosted on Weebly. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic and ClamAV detection. While no scripts were explicitly extracted, the nature of the embedded URLs and the ML classifier's high confidence score point towards a malicious intent, likely related to phishing or malware distribution.

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 https://pitabegojesol.weebly.com/uploads/1/3/0/5/130539936/9f4cfb2213ae.pdf
    • https://kigakawanok.weebly.com/uploads/1/3/0/4/130490876/fidekofavir-vabubiwa-xalepo.pdf
    • https://tunikivebuxido.weebly.com/uploads/1/3/0/2/130273899/sujepol_movijo_zujepimugawigo.pdf
    • https://topawuxopawi.weebly.com/uploads/1/3/0/5/130544132/cb29d9ad82.pdf
    • https://guwanibewuporo.weebly.com/uploads/1/3/0/3/130313220/4462864.pdf
    • https://xorojabimovunom.weebly.com/uploads/1/3/0/2/130289262/fd846d3ef5ce.pdf
    • https://zesiziwesaberut.weebly.com/uploads/1/3/0/2/130287989/degasenobadi.pdf
    • https://buzamejuti.weebly.com/uploads/1/3/0/4/130475990/binegipeju.pdf
    • https://mupujidiwib.weebly.com/uploads/1/3/0/4/130476168/popunodowedalef-monexopali-retexubozuxep-vulonebe.pdf
    • https://pajoridavokaze.weebly.com/uploads/1/3/0/5/130543494/pafuwovelogojewake.pdf
    • https://loxirogis.weebly.com/uploads/1/3/0/4/130435726/sexiwa.pdf
    • https://bigoxosomodep.weebly.com/uploads/1/3/0/5/130543543/130543543.html#examples+of+cholinergic+drugs
    • 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_off0000135f.bin
f5cd428b0eea449f463431afb21d6aab143a92377c1a335a2d73a2f7b4a2e937		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135F 8036 bytes
font_01_sfnt_off0000aade.bin
5d7ebd720715cd86529581f1d40cc643f68465477bd430d4be5ff736bc95f798		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAADE 16268 bytes

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