Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2b9bc16432f1c4…

MALICIOUS

PDF

34.1 KB Authoring application: Nitro PDF
MD5: fb301f4f604a676821a079580f135cb4 SHA-1: a26aa2e070f15f4a9cb1e631a034a7a48f102931 SHA-256: 7b2b9bc16432f1c484627542dd21e62eaabc5e83d7960b7fb2514a8aa5af8ad8
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 external PDF files, a technique often used for SEO spam or to distribute further malicious content. ClamAV and ML heuristics confirm the malicious nature of the document. The embedded URLs are the primary IOCs, suggesting a phishing or content distribution attack.

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://firstworldnewpaltz.com/uploads/1/3/0/5/130588540/748d9.pdf
    • http://newhopephotographylakeland.com/uploads/1/3/0/4/130476221/zijotojizazilel.pdf
    • http://theeightoneseven.com/uploads/1/3/0/5/130589288/4641076.pdf
    • http://louisagdesign.com/uploads/1/3/0/4/130476786/xovezenomawalax_xiwidodan_ganir.pdf
    • http://anewyoudetox.weebly.com/uploads/1/3/0/4/130488121/4541969.pdf
    • http://us.momotombochocolatefactory.com/uploads/1/3/0/2/130289669/130289669.html#honda+wave+100+electrical+wiring+diagram+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001091.bin
02c1e24b5dc4b818a88c69a9b921f41b54481a2c167074da4a37b69fd5bf58db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1091 7748 bytes

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