Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd7495471c5fa4f…

MALICIOUS

PDF

42.8 KB Authoring application: OpenOffice Draw First seen: 2020-09-24
MD5: 0d08fc6273cb0314f45eb9791934032e SHA-1: 8efc714eb4a0a7e337460c0c26b2c40bc2495ebc SHA-256: ecd7495471c5fa4fa3fc0bf8d1882d493a48c9369205bc6c82369eeb3fb5d654
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a large number of embedded links to external PDF documents, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are the primary IOCs, suggesting a phishing or content distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://mtbafghanistan.com/uploads/1/3/0/2/130287257/9339397.pdf In PDF document text
    • http://sterlingtoursltdeurope.com/uploads/1/3/0/2/130272890/0e628df74161c9.pdfIn PDF document text
    • http://valleydev3.weebly.com/uploads/1/3/0/4/130489467/40f9f.pdfIn PDF document text
    • https://rolosewukijam.weebly.com/uploads/1/3/0/3/130324063/6fcd0a.pdfIn PDF document text
    • http://lauraholmanbyrne.com/uploads/1/3/0/5/130588875/834532.pdfIn PDF document text
    • https://veripuxena.weebly.com/uploads/1/3/0/3/130323984/fuxibusuf.pdfIn PDF document text
    • http://molliebing.com/uploads/1/3/0/5/130590195/809af67ab723aa.pdfIn PDF document text
    • http://woki.htgarden.ru/uploads/2020/01/29/sekelotapoxonez_doguvuluribaw_zetesulusojek_lakuguzarune.pdfIn PDF document text
    • http://zonarofugo.cputik.ru/uploads/2020/01/28/b8b01a13a878a94.pdfIn PDF document text
    • http://caisdetroit.com/uploads/1/3/0/6/130604654/lubizuzikekox.pdfIn PDF document text
    • http://forupekuk.audiostart12.icu/uploads/2020/01/27/54e123a329be.pdfIn PDF document text
    • http://myphamxachtaytot.com/uploads/2020/01/27/c3f471f5d609.pdfIn PDF document text
    • http://xug.howdomakeit.com/uploads/2020/01/29/zuzulokavelomewazon.pdfIn PDF document text
    • http://playtherapyonlinetrainingacademy.com/uploads/1/3/0/6/130605462/sotufigani.pdfIn PDF document text
    • http://letterwithmia.com/uploads/1/3/0/2/130287441/70c16d.pdfIn PDF document text
    • http://bedowi.event-essence.com/uploads/2020/01/28/riwonaladenol.pdfIn PDF document text
    • http://mikhaelbassilli.com/uploads/1/3/0/5/130589399/4340164.pdfIn PDF document text
    • http://vaf.smpix.ru/uploads/2020/01/27/581814c.pdfIn PDF document text
    • http://woodlandstuition.com/uploads/1/3/0/4/130436049/130436049.html#best+android+phones+for+gaming+2018In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: valkrystore.org 4 samples

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA 8920 bytes
SHA-256: 5a54be98a9623b781abb309e29ea9cac4e447a61d18a08c8cb464aadfb1ca413
font_01_sfnt_off00005e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E16 16768 bytes
SHA-256: 1fb19a3e4b4e5f90a7347e6a9024fa5fb50df63c7316208be728a43e6e88f28a

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