Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f202c4e0b56ec06…

MALICIOUS

PDF

43.0 KB Authoring application: pstoedit
MD5: c787ab9bf731bd75fb5afbde79ff0dc2 SHA-1: aa8eb52d5e2b24b680dcac33c0bf2b5324139a73 SHA-256: 7f202c4e0b56ec06c6ec8cb688da47e0682f54a0f6112be232061ce9606e6e4a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links to external PDF files hosted on various domains. This technique, identified as PDF_SEO_LINK_FARM, is commonly used to redirect users to malicious websites or to host phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted from this sample, but the extensive link farm suggests a delivery mechanism for further malicious content.

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://stuffstories.com/uploads/1/3/0/4/130483489/tuvidagem.pdf
    • http://musicaturing.com/uploads/1/3/0/5/130590463/efac78cbc0027.pdf
    • http://mail.southernconcretellc.com/uploads/1/3/0/9/130969653/zivelatatub-jizekotisokoxe.pdf
    • http://renoroelandt.com/uploads/1/3/0/2/130289246/6c65d084.pdf
    • http://getadvantage.in/uploads/1/3/0/2/130289345/9255585.pdf
    • http://mikekelley.us/uploads/1/3/0/6/130639745/1134565.pdf
    • http://7pip.net/uploads/1/3/0/6/130604667/gizajeropo.pdf
    • http://www.soccerifc.com/uploads/1/3/0/3/130324047/777806.pdf
    • http://refle-x-tions.club/uploads/1/3/0/2/130288492/xemoxar.pdf
    • http://www.bluefieldlandholdings.com/uploads/1/3/0/6/130639239/8205718.pdf
    • http://mattwolbertphotography.com/uploads/1/3/0/6/130621483/lilolo.pdf
    • http://prcg.com.au/uploads/1/3/0/2/130291572/tupekovezo-fekinedav-dudoz-bubugaj.pdf
    • http://crosleyhome.com/uploads/1/3/0/8/130813654/galerixa_gokavizit.pdf
    • http://ortigroupltd.com/uploads/1/3/0/3/130312961/1428196.pdf
    • http://www.meoliviahall.com/uploads/1/3/0/4/130488946/xulevetuw.pdf
    • http://syxgems.org/uploads/1/3/0/5/130589163/zowefodulo_bidizalibuf.pdf
    • http://mixbotanicals.com/uploads/1/3/0/8/130813403/910054.pdf
    • http://www.thesterlingcherokee.com/uploads/1/3/0/6/130604836/zeripesotowu_fepasiwilav_nexisalibadi_nidif.pdf
    • http://allmytreasures37.com/uploads/1/3/0/6/130621273/nonano_zinekutukixa.pdf
    • http://www.onestepcloser.blog/uploads/1/3/0/5/130539756/xewuwana-jatujikiweviwij-vefavo.pdf
    • http://everestdobie.com/uploads/1/3/0/3/130324331/130324331.html#active+and+passive+voice+exercises+for+class+8+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048ea.bin
0b9814fb951a6b7baaae34e3f590bcb6b221e326ff9ed9fdc618a909acfafdaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48EA 8008 bytes

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