Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa9f11ba915426b…

MALICIOUS

PDF

45.7 KB Authoring application: Nitro PDF
MD5: d52d5641ffddedd91a74b457e3fef283 SHA-1: a8eddef0b91e6f8cfee0d5906fc0ecf873c6342c SHA-256: 7fa9f11ba915426b1a466b299684f7ec891479709c5f80ccb686a4f1405722fe
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of embedded URLs pointing to other PDF files, suggesting a link farm or a method to distribute further malicious content. The presence of these links and the overall detection indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://hitcharchive.com/uploads/1/3/0/6/130605173/goposi-pevonetot.pdf
    • http://grinninganyway.com/uploads/1/3/0/3/130323285/vogatagujeteku.pdf
    • http://jessicaspaulding.net/uploads/1/3/0/5/130539345/gakuperedij-zubuzeseze-vozej-biwegedow.pdf
    • http://kelseyleonofficial.com/uploads/1/3/0/5/130550711/silimi.pdf
    • http://oarkridgefarmsonline.com/uploads/1/3/0/5/130546183/49885cfe85c4b.pdf
    • http://prettiekitteedeals.com/uploads/1/3/0/5/130540609/a76ef.pdf
    • http://naukajazdywroclaw.com.pl/uploads/1/3/0/6/130639298/sitofeliwoneg.pdf
    • https://newapotunok.weebly.com/uploads/1/3/0/2/130289436/1986310.pdf
    • http://reveriebelgns.com/uploads/1/3/0/6/130604878/8543508.pdf
    • http://ministeringwithmegan.com/uploads/1/3/0/5/130539255/waredirivi.pdf
    • http://msusnackbox.com/uploads/1/3/0/6/130621741/030b8dfbac241e.pdf
    • http://returningtocompassion.org/uploads/1/3/0/3/130323547/327351.pdf
    • http://northernrailleaders.com/uploads/1/3/0/6/130604632/130604632.html#watch+when+marnie+was+there+full+mov
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001336.bin
670b409a4d84045488296060bad162dafa55957021b2db28cd80f63c49d4d2d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1336 8220 bytes
font_01_sfnt_off00006eae.bin
144a86dcfc8168168c762f301c00bd236d659d632f44701eb8a62fec96de90eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAE 5720 bytes

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