Malicious PDF — malware analysis report

Static analysis result for SHA-256 111403f45d4b2734…

MALICIOUS

PDF

58.0 KB Authoring application: pstoedit
MD5: 2383d18b11069677b301bc3b652a271d SHA-1: ec2815709a99cd48fe04c6e116903b86b43e41c4 SHA-256: 111403f45d4b273419f9fdf0be94acb106d4df1c2eee22f19e8a45aa0e39773a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 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 strongly suggest malicious intent. The embedded URLs likely lead to further malicious content or phishing pages, and the document body's garbled nature suggests it's not intended for direct user consumption but rather as a vessel for these links.

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://webmail.thechakrahousemn.com/uploads/1/3/0/2/130271128/vupujiw-woxusegilule-luwiz-tugegedejilo.pdf
    • http://kurthindustries.com/uploads/1/3/0/3/130323255/nogifik-bopisewojusitem.pdf
    • http://mta-sts.mail.lynn-gustafson.com/uploads/1/3/0/7/130740199/fugomajomi-lokixozumab-fepeweditaza.pdf
    • http://fandomaf.com/uploads/1/3/0/7/130775726/8411497.pdf
    • http://alessiadana.com/uploads/1/3/0/5/130589460/c9e2f2f36053ff6.pdf
    • http://www.meyersgina.studio/uploads/1/3/0/4/130435844/jebemowedugufip.pdf
    • http://sweetwaternetworks.com/uploads/1/3/0/6/130640194/nonelopuw.pdf
    • http://mxe.mokadelic.com/uploads/1/3/0/4/130477309/mikoniti.pdf
    • http://douillesachocs.com/uploads/1/3/0/5/130590770/vonadanozalumaxan.pdf
    • http://webdisk.kruiskids.co.za/uploads/1/3/0/4/130483459/lumuzir.pdf
    • http://tabletdevelopers.org/uploads/1/3/0/4/130476074/33f42621a.pdf
    • http://www.garyluciodogfood.com/uploads/1/3/0/9/130968920/6344bc642483.pdf
    • http://host139.carmichaelnl.com/uploads/1/3/0/9/130969851/130969851.html#extended+ascii+table+keyboard
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043d0.bin
4b25fdbda885a317fcca6a67b3176289adc8050e80911c5a2b947cbcb81a6b3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43D0 6608 bytes
font_01_sfnt_off0000521c.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x521C 16036 bytes
font_02_sfnt_off00006e59.bin
7bcadad8ffe3010798181a1497c71d6ca6b64db3ad5ff898d0462c5f1fc76126		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E59 23072 bytes

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