Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f660539165d85f…

MALICIOUS

PDF

53.2 KB Authoring application: OpenOffice.org
MD5: c7740b5eaa03468b0716068a83240236 SHA-1: 3d4d2ae434289b7c76edaa9f3ab9048620bd7bf5 SHA-256: 38f660539165d85f436a1f04338a9344ccb3a700dd3d68984d8d39b63a874cdb
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. This suggests a phishing or SEO spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted from this sample, and the document body was heavily obfuscated and unreadable.

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://www.bennyugarden.com/uploads/1/3/0/7/130739369/cc85751c.pdf
    • http://mta-sts.mail.vetrinaservizi.com/uploads/1/3/0/3/130323298/87d702ac5c9.pdf
    • http://justicecollaborativeatcornell.com/uploads/1/3/0/5/130588494/vakazejotamizon.pdf
    • http://rockout.live/uploads/1/3/0/6/130639655/7bcc63b2b4.pdf
    • http://musigep.org/uploads/1/3/0/2/130289731/kobikodadem-losigosijaw-kiwojuxiwi-rujuturuwazovu.pdf
    • http://suburbansubterranean.com/uploads/1/3/0/6/130639578/nawoxe.pdf
    • http://giniac.fr/uploads/1/3/0/7/130776504/duponofozoxu.pdf
    • http://www.exotica-tanning.com/uploads/1/3/0/7/130740218/ruzegux-fuliladet-wuziwebizukax.pdf
    • http://skinweekly.com/uploads/1/3/0/7/130775740/55f5cc.pdf
    • http://carlylepark.com.au/uploads/1/3/0/5/130545021/wogepobudazub-pejeguxon-funezit.pdf
    • http://www.hungrygirl.blog/uploads/1/3/0/7/130776078/sovijajivixesanivif.pdf
    • http://sofiyacattery.nl/uploads/1/3/0/8/130813509/lofub_solofesuxatozuk.pdf
    • http://txa4d.com/uploads/1/3/0/7/130739369/ginaxuvifelin.pdf
    • http://shopsimplybundles.com/uploads/1/3/0/5/130590373/fa7f1cdffebd831.pdf
    • http://hostmaster.projectsupportbemmel.nl/uploads/1/3/0/5/130539329/dusibev_jawaraboku_rapadipusajewu_jexibero.pdf
    • http://sharephotoset.com/uploads/1/3/0/2/130291591/4c147efa6.pdf
    • http://mx.floridatennismagazine.com/uploads/1/3/0/5/130590474/e223b8.pdf
    • http://bianxingjingangzhenren.br3h.com/uploads/1/3/0/5/130539046/130539046.html#homozygous+haemoglobin+constant+spring+a+need+for+revision+of+concept

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062f0.bin
04da625e6a60deaca856e39549e5325cb3f6179a115da7b8dce0e6e855166d60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F0 3272 bytes
font_01_sfnt_off0000715a.bin
0fd5ce3fb21d84fffd080567142449d03c5461885c7b42c7100811cb895f9317		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715A 9028 bytes

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