Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb21cc45e482b940…

MALICIOUS

PDF

41.1 KB Authoring application: Poppler-utils
MD5: ec18e81121f4f00ded7eb8ff971d7546 SHA-1: b98c23bb411c60a7a0e62d167552e3e7a3cd4d1f SHA-256: bb21cc45e482b940df010d58887e3e33050f11a2152b054e27e15002c00b2fb0
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm or SEO manipulation tactic, as flagged by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to distribute malware or phishing content through these links. No scripts were extracted, and the document body content is largely unreadable, making the link farm the primary indicator of malicious activity.

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://chanisehurst.com/uploads/1/3/0/6/130605036/3361430.pdf
    • http://7000extreme.com/uploads/1/3/0/4/130488691/61a5af74e561.pdf
    • http://kizaso.kaz24.com/uploads/2020/01/27/sebixojodeg.pdf
    • https://korofirul.weebly.com/uploads/1/3/0/5/130551467/wemagezumej-kanopiperufanas-gajajipuve-dokamafuza.pdf
    • http://eduardoamericomurrazzu.com/uploads/2020/01/28/2801833.pdf
    • http://crhardscape.com/uploads/1/3/0/4/130483957/mexafokib.pdf
    • http://gani.postroisvoydom.ru/uploads/2020/01/29/munosowumi.pdf
    • http://succacti.com/uploads/1/3/0/2/130288316/005a1.pdf
    • http://xkvate.com/uploads/1/3/0/6/130604617/6583702.pdf
    • http://andrewcarlosarchitect.com/uploads/1/3/0/4/130483047/xuzemozosoro_sunudevew.pdf
    • http://ghfohio.weebly.com/uploads/1/3/0/6/130604549/aa19025fad73b23.pdf
    • http://orl2019.nz/uploads/1/3/0/5/130550749/6116012.pdf
    • http://baloyatees.com/uploads/1/3/0/2/130272387/0c6b1b44bd305.pdf
    • http://urbanpho.com/uploads/1/3/0/2/130271195/jozifisotupenuwivag.pdf
    • http://govov.fertilizer-active.com/uploads/2020/01/28/e90a1cd.pdf
    • http://thresholdsorganizingco.com/uploads/1/3/0/5/130546971/fb899929a74ed36.pdf
    • http://natashasfantastic5dollarbling.com/uploads/1/3/0/4/130489001/0b9b81841e.pdf
    • http://makahisland.com/uploads/1/3/0/4/130477372/bosujujiritevab.pdf
    • https://tewavirimedox.weebly.com/uploads/1/3/0/5/130539846/gelodexulexipe.pdf
    • http://vipiska-egrn-besplatno2.icu/uploads/2020/01/27/87a227cb709f575.pdf
    • http://pedahzur.com/uploads/1/3/0/5/130544898/dedigojaje_fokezolajor.pdf
    • http://edgelandscapeandmaintenance.com/uploads/1/3/0/5/130588451/130588451.html#eating+for+blood+type+o+rh+negative

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001643.bin
902362f4d47c0920d257af07262466095448c57a1bad0d4f63be3165dc1db5c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1643 8272 bytes

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