Malicious PDF — malware analysis report

Static analysis result for SHA-256 748ec49994f5468e…

MALICIOUS

PDF

58.4 KB Authoring application: pstoedit
MD5: 1a143a1c8766ed427969c25bf7e6bc15 SHA-1: 30f5ca0f03eab11fb807f785218d59464993ac86 SHA-256: 748ec49994f5468ef17fb520f35fa134ca4d7105104f67e1dd97843c05b5d0bb
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded URLs pointing to external PDF documents, a technique often used for SEO manipulation or to distribute malware. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier score strongly suggest malicious intent. The document body text, while partially corrupted, mentions 'Fundamental beliefs of the adventist church', which appears to be a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://calyculin.com/uploads/1/3/0/5/130545954/lexenaxafo_nepam.pdf
    • http://newlifecpr.net/uploads/1/3/0/4/130479435/kimumapalozodifov.pdf
    • http://nanoswater.com.sg/uploads/1/3/0/6/130620416/soxoj.pdf
    • http://canon-services.com/uploads/1/3/0/2/130291784/wuxamiwifenezafapefi.pdf
    • http://varliakademi.com/uploads/1/3/0/5/130590507/3346389.pdf
    • http://chichomeinterior.com/uploads/1/3/0/6/130621870/8302026.pdf
    • http://narchbuilders.com/uploads/1/3/0/4/130477414/99b3c1fae3e7de.pdf
    • http://misssoutheastpageantry.us/uploads/1/3/0/6/130639899/130639899.html#fundamental+beliefs+of+the+adventist+church

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001178.bin
66633b206eed1bdcc9959b432cd483c56ded8afaabc4376a8e60e504f9a1c5f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1178 7448 bytes

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