Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4d329d3bf187cc8…

MALICIOUS

PDF

41.9 KB Authoring application: Mobipocket Creator
MD5: f56adbe6d9e57f1f4205281c5be50f27 SHA-1: 3801d9d03b1cebfdaaf647cfef7266c1d03eb725 SHA-256: b4d329d3bf187cc857ca84a652a0dc37538c290da7e82849817a3a1a8a3ebc9f
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as phishing. The document body, though heavily obfuscated, contains URLs that are part of this link farm, likely intended to lure victims into downloading further malicious PDFs.

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 https://fipumafes.weebly.com/uploads/1/3/0/5/130543840/fapigarubivat.pdf
    • http://branfordartcenterct.com/uploads/1/3/0/6/130604108/ad2b439043b907.pdf
    • http://beachesinsrilanka.com/uploads/1/3/0/6/130621161/novitunejakomo.pdf
    • http://newkindlife.com/uploads/1/3/0/6/130621620/kosuresoxugoteni.pdf
    • http://buysanfordrealestate.com/uploads/1/3/0/6/130605159/kubitig.pdf
    • http://untdnatives.com/uploads/1/3/0/3/130323318/efbc66727c5b444.pdf
    • http://pleasantgreenmethodist.org/uploads/1/3/0/2/130273850/52945.pdf
    • http://ww2.thumbprintgallerysd.com/uploads/1/3/0/3/130323449/6497469.pdf
    • http://msexcelplus.com/uploads/1/3/0/4/130483337/jazesam-movufojinu-xarakumajesire-xegapugasewunub.pdf
    • http://neoaxethrowing.com/uploads/1/3/0/5/130550970/d1491cceac4fea3.pdf
    • http://tutelavalletevere.weebly.com/uploads/1/3/0/4/130476744/newafovu.pdf
    • http://nextlane360.com/uploads/1/3/0/2/130272877/zevixovoravekoz_jawav_leruli.pdf
    • https://wabusefo.weebly.com/uploads/1/3/0/2/130287940/zojofofubu_tufedigesen_pubuvegiw.pdf
    • http://nationalbusinesseducationweek.com/uploads/1/3/0/4/130435652/jutojisemowuf.pdf
    • http://socialmediaflux.com/uploads/1/3/0/3/130323488/waxipopufetigevuk.pdf
    • http://boje.darcis-ko.fun/uploads/2020/01/29/5099209.pdf
    • http://neighborhoodpetcareclinic.com/uploads/1/3/0/6/130621501/130621501.html#balance+sheet+template+under+ifrs

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001510.bin
1af958b43a588bb9fa72a96cc7f0b8aa3e38c2bc661d93b2dcceb8f4fa9111cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1510 8176 bytes

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