Malicious PDF — malware analysis report

Static analysis result for SHA-256 a848bf56bb2a792b…

MALICIOUS

PDF

38.2 KB Authoring application: Nitro PDF
MD5: a1ed1e5ccecf4118131ca8d943842157 SHA-1: 8f3d65917bde915b8074bba8aa1285be37a3ce44 SHA-256: a848bf56bb2a792b82d1177b5e2169888fe5ad7d6e0a1de9cdcad717fe5f9154
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDF files hosted on various domains, indicative of a link farm. This technique is often used for SEO manipulation or to distribute malicious payloads. The ClamAV detection and ML classifier strongly suggest malicious intent, aligning with the PDF_SEO_LINK_FARM heuristic.

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://migromarine.com/uploads/1/3/0/4/130475997/8871099.pdf
    • http://weightbusters.net/uploads/1/3/0/7/130775023/xevabugilenodabuf.pdf
    • http://starrmark.net/uploads/1/3/0/9/130969021/tukuvaxikasufan.pdf
    • http://vhhealthcarefun.com/uploads/1/3/0/2/130272240/7022248.pdf
    • http://cscle.com/uploads/1/3/0/2/130288486/4580799.pdf
    • http://aldf.ca/uploads/1/3/0/7/130775242/4674767.pdf
    • http://mrskiriluk.net/uploads/1/3/0/5/130590029/juvodefarativetol.pdf
    • http://artisancabinetryva.com/uploads/1/3/0/9/130969021/sazokidu.pdf
    • http://mrmanateepoolservice.com/uploads/1/3/0/6/130620345/midekilukak.pdf
    • http://sarahannecreations.com/uploads/1/3/0/7/130740432/8ccd5bf2a54d4.pdf
    • http://beseecherllc.com/uploads/1/3/0/2/130289585/patokipasolesixulib.pdf
    • http://www.cloudytreeorganics.com/uploads/1/3/0/2/130287965/jajetu.pdf
    • http://yoyotk.com/uploads/1/3/0/6/130620159/vofobu.pdf
    • http://mindstate.store/uploads/1/3/0/6/130604765/1287696.pdf
    • http://cart.marisths.org/uploads/1/3/0/2/130287915/luziwefuzopuzo.pdf
    • http://ourslerenterprises.com/uploads/1/3/0/5/130590673/buwedigujamo_junupazozobo_suvafizebes_sitod.pdf
    • http://romeda.net/uploads/1/3/0/5/130545434/c8fa8c2d8a4275.pdf
    • http://mexpertnyc.com/uploads/1/3/0/3/130313440/5524e3b49ddab6.pdf
    • http://mta-sts.mail.namespaceconsulting.com/uploads/1/3/0/5/130544448/fusosebulujino-xolesibilezatuj.pdf
    • http://twincitieselectricmn.com/uploads/1/3/0/5/130547275/tidukowunonunuma.pdf
    • http://mzzle.com/uploads/1/3/0/6/130621854/xupovon-winamoxevek-sosotij-filerivex.pdf
    • http://benincaju.com/uploads/1/3/0/7/130776118/jativebutipide_pekinu.pdf
    • http://mkcpac.net/uploads/1/3/0/6/130639215/2061972.pdf
    • http://www.policetrailer.com/uploads/1/3/0/8/130874340/130874340.html#contract+form+for+car+sale
    • http://mta-sts.mail.namespaceconsulting.com/uploads/1/3/0/5/130544448/fusosebulujino-xolesi

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003217.bin
9cd0a0e44e1109dc43ecc37344a13ad31dbf06269cca6a4a42217272f27f93c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3217 8260 bytes

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