Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ca5660b051a651…

MALICIOUS

PDF

32.8 KB Authoring application: Nitro PDF First seen: 2021-08-20
MD5: 621a8ba3f347675f2dbe0e735031e142 SHA-1: c88cc21fc3fd71450fcbaca32e0980959141c4cd SHA-256: 75ca5660b051a651b83095be3ae57ea640b6ce8af83f050f7f331d951664b0fd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing and traffic generation. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://wunokumonorusis.weebly.com/uploads/1/3/0/4/130476709/e65d57b3fed0c.pdf In PDF document text
    • https://narurobu.weebly.com/uploads/1/3/0/2/130288465/abd2e.pdfIn PDF document text
    • http://minnickmanagementhoa.com/uploads/1/3/0/5/130544413/43382924e.pdfIn PDF document text
    • http://defenceprocurementnews.com/uploads/1/3/0/6/130605176/tugejoxumuzuxa_tilevisoru_naloguziworates_vosovelo.pdfIn PDF document text
    • http://aaronkleiber.com/uploads/1/3/0/5/130543462/a0630a8dba.pdfIn PDF document text
    • http://my36dates.com/uploads/1/3/0/5/130590469/tutewinefotudenewiji.pdfIn PDF document text
    • https://gebomibid.weebly.com/uploads/1/3/0/2/130273799/13e9cefbe0b.pdfIn PDF document text
    • http://raahulramakrishnan.com/uploads/1/3/0/6/130621284/8052486.pdfIn PDF document text
    • http://alampaki.weebly.com/uploads/1/3/0/4/130479435/bojipajuwiwib-bagisedadud.pdfIn PDF document text
    • http://kefifoz.nhatminhphoto.online/uploads/2020/01/28/6698287.pdfIn PDF document text
    • http://360pro.be/uploads/1/3/0/6/130620834/130620834.html#electronic+principles+malvino+7th+edition+solution+manualIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4 8364 bytes
SHA-256: 28caf00b487f1615f23ac76b7b894d5281d930f5435a3294a783e0759a1aa888

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