Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef547fe0980e4adf…

MALICIOUS

PDF

43.6 KB Created: 2020-03-13 05:09:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c1b7f3c2253e11e939adf1aacd3d20cc SHA-1: 2ba49deb00fefd4ddd566de5316497dee48b7cfe SHA-256: ef547fe0980e4adf98527affe5bbf38656000ccf435cb96c6f6f132563a073fa
92 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'Low glycemic index indian food list' but its primary function is to act as a link farm. The heuristic PDF_SEO_LINK_FARM indicates that the PDF contains numerous external links, specifically 13, to other PDF files hosted on various domains. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs are likely part of a scheme to drive traffic to malicious content or to host further malicious documents.

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://zpvdb.bpmtc.com/uploads/1/3/1/1/131164558/131164558.html#low+glycemic+index+indian+food+list
    • http://aegisve.com/uploads/1/3/0/3/130379590/kegaxezomujeguwofi.pdf
    • http://www.pain-reliefchiro.com/uploads/1/3/0/8/130873824/kobik.pdf
    • http://www.taptapapps.com.au/uploads/1/3/0/5/130588542/vedudo.pdf
    • http://blueegg.net/uploads/1/3/0/6/130621597/777193.pdf
    • http://grisipetcare.com/uploads/1/3/0/5/130588656/c8479dabfe.pdf
    • http://www.antheadapparel.com/uploads/1/3/0/4/130476203/536453436d744.pdf
    • http://www.mail.cmcmanagement.biz/uploads/1/3/0/2/130291591/disenajizirud_jusepi_nasewodenum_zoratelunis.pdf
    • http://projectcleanuluwatu.com/uploads/1/3/0/4/130476722/9167796.pdf
    • http://angiemoll.com/uploads/1/3/0/7/130776575/jalosabe.pdf
    • http://kasperlawnandlandscape.com/uploads/1/3/0/3/130379597/goleporosojil-zazikosef-noxukuxoredozes.pdf
    • http://rja-designsbyslaglellc.com/uploads/1/3/0/3/130323209/48fc37869d.pdf
    • http://www.energiaconproposito.org/uploads/1/3/0/2/130288592/6303122.pdf
    • http://transformingliveschurch.org/uploads/1/3/0/6/130605331/xesogex_fuzutimawusa_bezipafefadowup_keluguvolumud.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080d2.bin
a45d28baa5b943a6e111dd6ee81426104feab185c1aabee3d4dbb52b1ab316d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80D2 8580 bytes

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