Malicious PDF — malware analysis report

Static analysis result for SHA-256 0635b7435320fe07…

MALICIOUS

PDF

36.3 KB Authoring application: LibreOffice
MD5: 8c6adc1ea99e2682997db8dfb8534dbe SHA-1: 2f2f682cb15605f55661597a38e5bcb23b313912 SHA-256: 0635b7435320fe07eb840144c43fad78f9e16a3a5b2aa06c5a36b270bc1fe6be
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, indicating a link farm or a distribution mechanism for further content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or SEO abuse. No scripts were extracted, but the structure implies a spearphishing attachment used to direct users to malicious external resources.

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://crowdtrends.com/uploads/1/3/0/5/130588980/a17ce.pdf
    • http://iqfee.net/uploads/1/3/0/5/130543466/wifub.pdf
    • http://antconsultationrooms.com/uploads/1/3/0/4/130476483/zesofen-kipurukubef-xavupukujutepo-jukanafudu.pdf
    • http://chule.es/uploads/1/3/0/7/130740060/43397f0.pdf
    • http://stair.company/uploads/1/3/0/6/130605089/55c51b758.pdf
    • http://bayareaspark.com/uploads/1/3/0/7/130775698/8329780.pdf
    • http://alchemy-designstudio.com/uploads/1/3/0/3/130323109/xokefelelan.pdf
    • http://off2grandmashouse.com/uploads/1/3/0/7/130739232/lotifawasime.pdf
    • http://josephdanielglobal.net/uploads/1/3/0/5/130588740/5187105.pdf
    • http://jy-la.org/uploads/1/3/0/3/130323475/298e156f41.pdf
    • http://www.sanchezmarissa.com/uploads/1/3/0/2/130272432/kuxinepojojijusoga.pdf
    • http://doorado.net/uploads/1/3/0/3/130324357/e62e83a6312.pdf
    • http://prophecyoutlook.org/uploads/1/3/0/7/130739256/sikadifipaterom.pdf
    • http://naa6l.salon225.com/uploads/1/3/0/4/130436173/130436173.html#how+to+save+pdf+file+in+powerpoint+2007

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035a7.bin
74e3401425aad0b8a8141a9f8196cf6692b56c2825bb562e0518db8a4b635c6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35A7 7760 bytes

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