Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4a32c5bdc7e88ba…

MALICIOUS

PDF

38.2 KB Authoring application: LibreOffice
MD5: add1a1782c392f48b5eedc64705aed3b SHA-1: bdbe9a828242f303f85f455a91bd5f203b73b657 SHA-256: c4a32c5bdc7e88ba6bbbc5993152143a3a68f5d51d0a6bf37d7d34ced1a55058
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, a technique often used for SEO spam or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious 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://colibot.com/uploads/1/3/0/4/130435592/gaveporoloriku_dekupelik_nifugonito_misativ.pdf
    • http://moleculeminions.com/uploads/1/3/0/2/130272603/4471b.pdf
    • http://lasliben.store/uploads/1/3/0/5/130589420/5df4841.pdf
    • http://nicknewmont.net/uploads/1/3/0/4/130476122/vofedo.pdf
    • http://mrjmusic.org/uploads/1/3/0/5/130544063/xopanavu.pdf
    • http://mosquesjobs.com/uploads/1/3/0/2/130289379/34f64a4afaf8df8.pdf
    • http://nodoubthomeinspection.com/uploads/1/3/0/4/130436125/7883548.pdf
    • http://kenrictaylor.net/uploads/1/3/0/6/130605018/lisogawulifu.pdf
    • http://samanthasunday.com/uploads/1/3/0/2/130271011/kosenevot-sexitufudev-zugebodevar.pdf
    • http://megachina.ru/uploads/2020/01/29/petojenetupen.pdf
    • http://claycountyedc.com/uploads/1/3/0/8/130814856/jobikuse.pdf
    • http://theacneandskincareclinic.com/uploads/1/3/0/8/130814286/pagigux-wugusotakuw.pdf
    • http://1001brushstrokes.com/uploads/1/3/0/2/130272102/130272102.html#typhoid+vaccine+boots+price

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001314.bin
7ea309ab7ac97e05de2d789faa6650be24ce6efaacb89b2af49534023e254c82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1314 8888 bytes

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