Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca860eea3f38282…

MALICIOUS

PDF

43.8 KB Authoring application: PDF Studio
MD5: f0a62a808403cf03d205c699fcd196e5 SHA-1: 8b67990fe848b2b44dc64e048b11679c9e522a2a SHA-256: cca860eea3f382824d473cdb511bf567226fe726acf92a0f6a02dd5df2c2bede
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic and ClamAV detection. The ML classifier also strongly flagged this file as malicious. No scripts were extracted, and the document body was heavily truncated, limiting further analysis of the specific 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://speechanddebatecamps.com/uploads/1/3/0/2/130289214/e55ce33830.pdf
    • http://malleemumdusters.net/uploads/1/3/0/6/130604338/2ecbbe2c0384c0.pdf
    • http://nicolettabuildingcontractors.com/uploads/1/3/0/5/130542859/tinoraf_tamumad_gutef_lajizikorezipo.pdf
    • http://nwlaautomationgroup.com/uploads/1/3/0/4/130491513/1aafe0.pdf
    • http://mythbay.com/uploads/1/3/0/3/130379612/kofab-nurik-doxib.pdf
    • http://northforknews.net/uploads/1/3/0/5/130588554/xokosagikata.pdf
    • http://db2construction.us/uploads/1/3/0/5/130548152/xuveketireda.pdf
    • http://standingtallcounselling.com/uploads/1/3/0/8/130814718/kuvituwuwuti.pdf
    • http://teepinesses.com/uploads/1/3/0/4/130436089/kibemikajulodu_laleridabaje_vozigokape.pdf
    • http://musicwithjojo.com/uploads/1/3/0/6/130605373/4061172.pdf
    • http://www.farazadr.com/uploads/1/3/0/6/130620423/193767.pdf
    • http://julienhauss.com/uploads/1/3/0/4/130436054/3be555.pdf
    • http://bali-immo-villa.com/uploads/1/3/0/7/130776025/5695666.pdf
    • http://rmtdesigngroup.com/uploads/1/3/0/5/130551523/a723f5.pdf
    • http://shopkashkoutureko.com/uploads/1/3/0/7/130739284/ccdab2cb5d.pdf
    • http://tortugamobile.com/uploads/1/3/0/7/130776174/5476523.pdf
    • http://malouky.com/uploads/1/3/0/4/130483795/38de6d569a.pdf
    • http://mail.offendervictimministries.org/uploads/1/3/0/4/130489669/7828616.pdf
    • http://skinsana.net/uploads/1/3/0/6/130603874/914332ae0b24d5.pdf
    • http://meditierrapvb.com/uploads/1/3/0/5/130590305/wejobiwuvisoxunavo.pdf
    • http://bigdipbirding.com/uploads/1/3/0/6/130620380/bc04bf2912.pdf
    • http://www.bluebonnetspeech.com/uploads/1/3/0/8/130813860/mowisemixaxifu_sugil.pdf
    • http://byronestates.com/uploads/1/3/0/5/130589014/9021578.pdf
    • http://meskeel.blog/uploads/1/3/0/7/130775907/gavovajajetopik-volizebip.pdf
    • http://alcoacommunityfcu.com/uploads/1/3/0/6/130620948/ganosakarone_gajiwumekesin_modunimujelaki_lowixed.pdf
    • http://inlandcbd.com/uploads/1/3/0/2/130272575/130272575.html#icj+advisory+opinion+kosovo
    • http://mythbay.com/uploads/1/3/0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046ee.bin
836be0c6512d2437d93d9734ddd10897148ca5f13f040b87ebd8239bf38bb711		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46EE 8092 bytes

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