Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc5dbca24c4f764…

MALICIOUS

PDF

39.0 KB Authoring application: PDFBox
MD5: be78beb47395794fdd5a9713ee2aa826 SHA-1: 67a84a8eab7a5a218d9c3935a6a4442766b392dc SHA-256: 2cc5dbca24c4f764ea0705857d52a35b83085bc98f794c104963234246b5c322
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 external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. No scripts were extracted, and the document body was unreadable, but the heuristic firings and numerous URLs are sufficient to assess the attack pattern.

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://amesburychildrenstheatre.org/uploads/1/3/0/2/130273872/66731de4fb8a.pdf
    • http://lorenzfiduciaryservices.com/uploads/1/3/0/2/130272406/a26a2788a153d1e.pdf
    • http://bizapps4u.net/uploads/1/3/0/6/130639233/demuwudebogosud_mafalixuj.pdf
    • http://cpanel.myonecreation.com/uploads/1/3/0/6/130639410/917b6.pdf
    • http://extentrics.com/uploads/1/3/0/6/130621277/3baecf.pdf
    • http://hostmaster.womensoutdoorweekends.co.uk/uploads/1/3/0/7/130740566/dasekiwuberi.pdf
    • http://crownhaven.org/uploads/1/3/0/2/130271111/fabewesege_xirasosawuzup.pdf
    • http://teambassknob.com/uploads/1/3/0/4/130488101/59978920469f.pdf
    • http://vernalinzey.com/uploads/1/3/0/5/130539797/ziperegosusizet.pdf
    • http://mechanicalbuildingsolutions.com/uploads/1/3/0/7/130740444/9878a39c3a1b6.pdf
    • http://oasismethod.com/uploads/1/3/0/5/130539908/bivopodezirepikinuto.pdf
    • http://kevinpistole.com/uploads/1/3/0/7/130776336/6704632.pdf
    • http://chiavantage.com/uploads/1/3/0/2/130272898/walinisepafedasupune.pdf
    • http://koffienator.nl/uploads/1/3/0/5/130545784/3150329.pdf
    • http://cruxportal.com/uploads/1/3/0/6/130639291/viginixejale.pdf
    • http://abject-adventures.com/uploads/1/3/0/2/130288456/wogopopiv.pdf
    • http://cododuo.com/uploads/1/3/0/8/130813876/0f8ac8fa80f.pdf
    • http://district197middleschoolsports.com/uploads/1/3/0/7/130738628/45289537c6def.pdf
    • http://x-staticapolefitness.com/uploads/1/3/0/4/130488399/f18b3eabac18.pdf
    • http://66wtnr.salon225.com/uploads/1/3/0/5/130589264/130589264.html#3+digit+addition+with+regrouping+worksheets+for+2nd+grade
    • http://koffienator.nl/uploads/1/3/0/5/13054578

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e42.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E42 2652 bytes
font_01_sfnt_off000039f0.bin
42fb816064ff0f7f019285229e1d466cd334fe0f8950927a7b04248addd1aaae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x39F0 7692 bytes

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