Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0fd7515a132fe88…

MALICIOUS

PDF

41.3 KB Authoring application: PDFedit
MD5: cf267c1ad1b378a00333cd99af3dfd53 SHA-1: 39851a25eae793a38e8356c3ddc55dc7e123b9f8 SHA-256: b0fd7515a132fe88a574319eeb286b00df7eae553e0c42f708342a55d0460027
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing by ClamAV. The primary attack pattern involves directing users to a network of linked sites.

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://bakerstoves.com/uploads/1/3/0/5/130545784/lenefefagesiwa.pdf
    • http://artproracing.com/uploads/1/3/0/5/130543539/65b69b.pdf
    • http://pattenfinancialservices.com/uploads/1/3/0/6/130639476/rukow.pdf
    • http://curiosibox.com/uploads/1/3/0/7/130739483/kifulanegumolu-xuzopokozex-mubagakuvema-puxewo.pdf
    • http://dimeperhead.com/uploads/1/3/0/5/130550675/tomexolovotak_kezanokure.pdf
    • http://www.casatavares.pt/uploads/1/3/0/6/130639565/5382155.pdf
    • http://mylkshoppe.com/uploads/1/3/0/6/130621607/dotaxetivusurib.pdf
    • http://thisiscontent.io/uploads/1/3/0/6/130621345/4958702.pdf
    • http://safedrivingschool.net/uploads/1/3/0/2/130287313/4e80631a5b.pdf
    • http://try.therapyprime.com/uploads/1/3/0/8/130874073/vuparawuziruk-jiretotajopovo.pdf
    • http://calgarymarketingonline.com/uploads/1/3/0/6/130639034/palewo.pdf
    • http://www.houstonghostwriting.com/uploads/1/3/0/3/130379485/resosenozezonuzosi.pdf
    • http://swingingcool.ch/uploads/1/3/0/4/130476778/8808177.pdf
    • http://josephdefeo.net/uploads/1/3/0/3/130323423/tavogukuzol.pdf
    • http://monagarciamusic.com/uploads/1/3/0/5/130543941/af35e.pdf
    • http://therealmommy.com/uploads/1/3/0/6/130621383/1038a8.pdf
    • http://callmyhearthome.com/uploads/1/3/0/7/130740087/jipabizuvas-roperosiloxogol-besenil.pdf
    • http://abrolhoslandscaping.com.au/uploads/1/3/0/6/130604637/f8765b98.pdf
    • http://www.29thandsouthcentralhome.com/uploads/1/3/0/4/130489359/nezumetulakamefomeb.pdf
    • http://canyonman.org/uploads/1/3/0/8/130814360/3076741.pdf
    • http://www.tesahil.com/uploads/1/3/0/4/130436049/dekasal-fenojigagiko.pdf
    • http://highheartglobal.com/uploads/1/3/0/6/130639181/bufatotodi.pdf
    • http://marilusdesigns.com/uploads/1/3/0/7/130740349/130740349.html#apache+beam+combine+example

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002956.bin
26ab36b4df2b0ebc892d0e13ceeaa85ecd0d31b6561ffc1cfaf583f8c11a28aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2956 6372 bytes
font_01_sfnt_off00004141.bin
4c00233bf0fb6f35cc900a7a31624707ef375513c3ece205dddddd1cf4ac1c92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4141 7336 bytes

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