Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48273ad5e4eaeaf…

MALICIOUS

PDF

78.0 KB Created: 2021-09-18 12:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7c2762664734369339c63168c3e31689 SHA-1: cc45db851c2c9f67ec1c0555c3d76deedbdacd5f SHA-256: e48273ad5e4eaeaf0c3e09079aed27cdb6b127229bf7c8dbc5a2f4a77d98450a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to various domains, some of which are associated with compromised CMS uploads or disposable hosting. This pattern suggests an attempt to lure users to malicious sites for phishing or further exploitation.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3607

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 https://pistant.ru/uplcv?utm_term=how+to+change+text+to+speech+voice+tiktok PDF link annotation
    • http://gokea.org/upload/editor/files/javuluvowusexiriwajado.pdfIn PDF document text
    • http://konikanarrowfab.com/ckfinder/userfiles/files/zovidoxezelufenutolowu.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///53641887979.pdfIn PDF document text
    • https://keongracun.org/contents/files/60512182399.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210910033815.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/37328674947.pdfIn PDF document text
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/99645263219.pdfIn PDF document text
    • http://lawngo.net/fckfiles/35479704534.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/16210543582.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/59168108126.pdfIn PDF document text
    • http://hc6999.com/userfiles/files/xugugixik.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109052344138947.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/mefidebajud.pdfIn PDF document text
    • http://stapper.de/sites/default/files/userfilesfile/45535402772.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16132aad340d55---81485487876.pdfIn PDF document text
    • http://vladekoservis.ru/files/49600628445.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/badasizibovijosutafefow.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/zetubuvasisuzipukemu.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/gewavowanamenifuvemelu.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16145a9c43f0d4---porolefituvazij.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/59ae2d43a2f5eae8de4b06968da8a1cb/lamugijegarizuf.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/zowodaba.pdfIn PDF document text
    • http://zamgph.com/uploads/file/031411075231.pdfIn PDF document text
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/xelowidajiv.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/f2f780d19154957e83e735ab72f8c561/javediwenanadif.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1A 10844 bytes
SHA-256: d8cd2158fc09715bb922bff8add60c3afae1bf5b0486607bf155243ddfbcd0b9
font_01_sfnt_off0000f52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D40 18068 bytes
SHA-256: d867d02e2d6dfca02b2594521801e90737f52a01e189a9b0ebeb7a8f108685df

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