Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb4b3f6bff6b2e8…

MALICIOUS

PDF

39.9 KB Authoring application: OpenOffice Draw
MD5: 9c4e862d6cd9ea9b2a01bbdb395d3297 SHA-1: 29108389acb768879a2f986c6497f1428d2c160e SHA-256: 3fb4b3f6bff6b2e8f458c3239f38562cd908786ef02934fa70632b9a0d0bde69
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, and the document body is heavily obfuscated, preventing a more detailed analysis of the lure.

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://glslang.org/uploads/1/3/0/3/130323295/a091c14.pdf
    • http://www.trilogyyarns.com/uploads/1/3/0/8/130874016/8529416.pdf
    • http://beyondexcellencerealty.net/uploads/1/3/0/6/130604185/vawokurewufo.pdf
    • http://marissecollections.com/uploads/1/3/0/5/130590594/puxug-wolewifinonufa-dutiworafok.pdf
    • http://dancedietitian.com/uploads/1/3/0/4/130435895/ce24e27b.pdf
    • http://slpprint.ca/uploads/1/3/0/5/130590140/8713298.pdf
    • http://shsbands.org/uploads/1/3/0/2/130288639/tiluli_sebane_sujis.pdf
    • http://mydnchef.com/uploads/1/3/0/2/130274169/9045640.pdf
    • http://shopdaytoknightstyles.com/uploads/1/3/0/2/130287938/toxaxatutiminiru.pdf
    • http://mta-sts.mx.tycammarketplace.com/uploads/1/3/0/7/130739165/e286b42.pdf
    • http://www.kstraining.net.au/uploads/1/3/0/2/130288514/pegujuzet.pdf
    • http://floridamasonryawards.com/uploads/1/3/0/8/130813765/babumubigijoxedu.pdf
    • http://hannahb-photography.com/uploads/1/3/0/4/130489371/1532556.pdf
    • http://120lakeshoredrive.com/uploads/1/3/0/5/130540477/dopesatitub-zetegovo-jumakimiwixit-basawebifaguju.pdf
    • http://iguazufallstour.net/uploads/1/3/0/9/130969652/5824842.pdf
    • http://actionsportsindex.net/uploads/1/3/0/6/130604737/1975982.pdf
    • http://socalseas.com/uploads/1/3/0/6/130620674/zuzovon.pdf
    • http://justincollard.bio/uploads/1/3/0/7/130739889/namovupesito_gerenowibif_lesanibetof.pdf
    • http://mta-sts.selectbuildersinc.com/uploads/1/3/0/7/130775665/jajusa.pdf
    • http://nwlaxshack.com/uploads/1/3/0/7/130739103/zibegab-folezifodi-kudebotome-fokodemoke.pdf
    • http://host236.carmichaelnl.com/uploads/1/3/0/7/130775258/130775258.html#apache+junction+arizona+rentals
    • http://marissecollections.com/uploads/1/3/0/5/130590594/puxug-wolew

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003ad5.bin
b28cca1a8ed22438f4ecd963e0959933fe09052201b29e7822ad30d5b03f3e9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3AD5 8456 bytes

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