Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2eb393e121b3f4…

MALICIOUS

PDF

76.2 KB Created: 2021-09-02 07:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e9257b7951014286fe9393f47292c8bc SHA-1: d067d0a4293079931eec4b4dd7c467e0c9d8ff6c SHA-256: 9e2eb393e121b3f4085788113b4ab51023f080b13e506fa1ece633726221e0d3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a large number of links, many of which point to compromised WordPress sites. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggests a phishing or trojanized document. The presence of a link farm on disposable hosting further indicates malicious intent, likely to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2830

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/pmsevi9n8abr3gqqts7vm55u3a/12407768147.pdf In PDF document text
    • http://rfychina.com/upfiles/files/16258001074716.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210805081346.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/73330391401.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c888e393466---wejanejuwad.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/ncvaruost82mqgk4qs875majse/nijimemagepi.pdfIn PDF document text
    • https://centrumschoolka.pl/photos/file/16144365761.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/bilonufajefusipudejinala.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/8d64ef86f3c9c85fcd4c2e6c54fe39f5/bugeporufafodaxugaz.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085d49c1031c---dakojajuvelepisifinepogo.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/ginevemorajopigug.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/7gvd6kai5bblelg6e7ijnpmto3/vetamimiw.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/wulunomezideresoperowi.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/dbce5049ea540d55e4b1da41f40284a0/pawej.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/vuvogovunodulunoxil.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/33970507209.pdfIn PDF document text
    • http://totoumi.jp/upload/file/51376080174.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/zuduwusezafufisezawu.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/6cdfbdbe51cfdba2ecb444045287ce3c/53756651068.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/16841418088.pdfIn PDF document text
    • http://lawyermo.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tipadonupuzet.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/71516036892.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8afe445ca---bajebofuga.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/nukibez.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/1m55ce0f5u2la4appcc3dvg1g7/fipupax.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eec46bf709---59690771947.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b0621bb07e8---79570921042.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+get+rid+of+e+in+an+equationPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DC 10640 bytes
SHA-256: ec18a8d11412c678eb3e4bd9cd8d58edc0b865e2910bcc60e367664f6e11d926
font_01_sfnt_off0000f8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D1 19016 bytes
SHA-256: a1720849952cc9ccce43c9b30de27fbaae60b69f4db76678c96b1cdd3b2d3b8f