Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21b2c3d51684165…

MALICIOUS

PDF

34.7 KB Authoring application: Pdftk
MD5: a6236044dff71ca1d43e0015998ad69f SHA-1: 81cc9f28943ba4183b1e8e1f6e040f3c9315b558 SHA-256: d21b2c3d5168416500126bbfdb75cbccd1bb42463125489916f66ce9434b1955
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flag this file as malicious. The primary purpose appears to be directing users to a network of potentially malicious or SEO-manipulated websites.

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://pinsights.net/uploads/1/3/0/4/130476462/sexosi.pdf
    • http://www.recycled-thrift.com/uploads/1/3/0/2/130289284/a0a02c7390a8.pdf
    • http://www.northsouthappal.com/uploads/1/3/0/6/130604188/zobotobezirat_nivijufotixaxo.pdf
    • http://solverbi.com/uploads/1/3/0/5/130551697/butenagazuv_nosigumet.pdf
    • http://yamayogacollective.com/uploads/1/3/0/5/130551106/7679792.pdf
    • http://ilmangiatore.com/uploads/1/3/0/8/130874240/sapuf-zuzemejovif-segewereniz.pdf
    • http://natashafine.com/uploads/1/3/0/3/130323599/fc791c62b17b33f.pdf
    • http://taccireland.com/uploads/1/3/0/7/130738859/58bae16798d.pdf
    • http://sharegenki.com/uploads/1/3/0/7/130739198/kamezonapukaxejak.pdf
    • http://asbestosinamerica.com/uploads/1/3/0/6/130603982/bafffd3.pdf
    • http://southlaketahoetowing.net/uploads/1/3/0/8/130813849/xenonepegap.pdf
    • http://kennie2signature.com/uploads/1/3/0/6/130604808/sazovubegifexila.pdf
    • http://www.madasahatterptown.com/uploads/1/3/0/4/130488884/1388979.pdf
    • http://danscentrumnorr.com/uploads/1/3/0/6/130604844/xifezilave-fizadik-nisagodox-vupel.pdf
    • http://meredithlagerman.org/uploads/1/3/0/4/130483546/caa0b7910.pdf
    • http://ligueusa.net/uploads/1/3/0/5/130588195/6439007.pdf
    • http://tabletopleague.com/uploads/1/3/0/5/130544313/dapebevibilubaj-wobonidobip-powab.pdf
    • http://pmckfunctionalfitness.com/uploads/1/3/0/4/130435943/gekuzowutorukibo.pdf
    • http://mx10.carmichaelnl.com/uploads/1/3/0/5/130546196/130546196.html#arduino+mega+2560+clone+driver+windows+7

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a24.bin
6ddb012a3a658664552a37a82544acc002b2f4fc2b629167dc3f7f965b8b21c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A24 7804 bytes

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