Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7191ca7ddae055a…

MALICIOUS

PDF

81.4 KB Authoring application: LibreOffice
MD5: cdf65dfeef13e088ec7a11759d672a14 SHA-1: f662394e27df37c500229d8023d1dc7017aa441e SHA-256: b7191ca7ddae055a29b5ae3251ce6ee0d4ff7af6183c6ff83897f46b24468d9e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vendeziproperties.com/uploads/1/3/0/5/130551418/zemefakiso-zefotebogawofaw-zemofasenepaze-vifopulog.pdf
    • http://momnovel.com/uploads/1/3/0/4/130483491/2456162.pdf
    • http://umbcs.com/uploads/1/3/0/7/130739684/silera_parimali_murovevowoxu.pdf
    • http://technobrain.company/uploads/1/3/0/3/130313241/nuduverep.pdf
    • http://kimghattas.net/uploads/1/3/0/3/130323295/kamore_jujibigur_fatafosuvuvukix.pdf
    • http://cerecdigital.com/uploads/1/3/0/8/130814021/3c8b585183ae.pdf
    • http://stellarosemarywalling.com/uploads/1/3/0/2/130291036/5146245.pdf
    • http://newhavenbooksellers.com/uploads/1/3/0/4/130489020/mejutixoxiko_muram_nipodagegu_mekox.pdf
    • http://negativeopus.net/uploads/1/3/0/2/130287296/3498961.pdf
    • http://superyachtpanel.com/uploads/1/3/0/7/130739423/1655523.pdf
    • http://coalitionagainsthumantrafficking-northernaz.org/uploads/1/3/0/4/130490585/pirokomoredad.pdf
    • http://millennialcruisers.com/uploads/1/3/0/4/130436171/koweje.pdf
    • http://bobdechert.com/uploads/1/3/0/6/130604369/2289904.pdf
    • http://www.rosieriggir.com/uploads/1/3/0/2/130288333/5791418.pdf
    • http://nchi.shop/uploads/1/3/0/5/130551270/ab31ae20.pdf
    • http://phumyhungmidtown.net/uploads/1/3/0/3/130312969/af4d45d2d58c4.pdf
    • http://creedompublishing.com/uploads/1/3/0/6/130620880/1365039.pdf
    • http://wimpernserum-erfahrung.org/uploads/1/3/0/5/130547215/6173008.pdf
    • http://animaliadiertraining.net/uploads/1/3/0/2/130291474/472dae8a87a.pdf
    • http://canichecouture.com/uploads/1/3/0/6/130604373/najinajobixipuwamib.pdf
    • http://fnf.brdge.org/uploads/1/3/0/6/130621507/130621507.html#principal+causa+de+abdome+agudo+obstrutivo

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055a8.bin
f16b63511a2c0474c50951dcdc52deee4eb6f04e9b38ab335bef3ee3951100e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55A8 11448 bytes

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