Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a716c8f3770c66…

MALICIOUS

PDF

32.3 KB Authoring application: PDF Studio
MD5: d57e925a9a23f2cc0aefb4adc62d5304 SHA-1: ce2ff212a6971ab2e11e70688b2ce4413049bbc3 SHA-256: 03a716c8f3770c668178651c0b418115fe24dc15297e669204e665e4e7bd609d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also strongly suggest malicious intent. The embedded URLs are likely used to redirect the user to malicious content or phishing pages.

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://lindsaypulsipher.net/uploads/1/3/0/2/130288458/wosep-moginegelel.pdf
    • http://callananfitclub.com/uploads/1/3/0/7/130739449/5071097.pdf
    • http://77thscouts.ca/uploads/1/3/0/6/130640227/koxumexelezi.pdf
    • http://xtremetruckandtrailer.com/uploads/1/3/0/4/130488486/2686482.pdf
    • http://bilper.pt/uploads/1/3/0/6/130639479/2334902.pdf
    • http://belindabucknell.com.au/uploads/1/3/0/7/130740440/rasubililejofike.pdf
    • http://wehelphomes.com/uploads/1/3/0/5/130551091/bidaxux_zufujuso_ponowilonamekaf.pdf
    • http://johnnyboyspizza.com/uploads/1/3/0/5/130543568/9136605.pdf
    • http://middleclassmusings.com/uploads/1/3/0/3/130313741/8609606.pdf
    • http://mfibuild.com/uploads/1/3/0/8/130813054/cc03865d3f4b4.pdf
    • http://obryantdesignscapesllc.com/uploads/1/3/0/5/130588727/kinubabodox_nipudagibuso_daletodalok_wajemexeteveg.pdf
    • http://xinshijiyulechengzenmejinbuqu.br3h.com/uploads/1/3/0/7/130738708/130738708.html#reading+passages+for+1st+grade

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002725.bin
719e46d731ef65dcc3192da4e68d8bcbf5faf6378908de4026358085ee4dea09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2725 7808 bytes

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