PDF malware analysis — malicious · cd04fffd50f455ff

MALICIOUS

PDF

87.3 KB Created: 2021-09-23 19:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: cabbf612f6a5d242d68c6d98a4b57f71 SHA-1: 39c66bd76fa7d8e59bfdf69eecedf6d392dc6de5 SHA-256: cd04fffd50f455ffa5fc3b3f52785fd408fe2365556acbabf0d358fde4589a30

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host and distribute malicious files. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were directly extracted, the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier suspicious score 0.3704

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://namlinhchivietnam.net/userfiles/image/file/32422724804.pdf In PDF document text
- http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409ec594a98---pewiwiwoputunekozof.pdfIn PDF document text
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137351a63448---47283659029.pdfIn PDF document text
- https://casasholidays.com/scgtest/team-explore/uploads/files/24482404571.pdfIn PDF document text
- http://web-news.eu/www/pkpar/userfiles/file/gepijajupofubema.pdfIn PDF document text
- https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/a5c14643626567353a6d909853443122/vozaxofe.pdfIn PDF document text
- https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/fagojudeji.pdfIn PDF document text
- http://fabtur.ru/upload/files/muganew.pdfIn PDF document text
- http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614117a6e1fe9---58000621359.pdfIn PDF document text
- http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/73014779078.pdfIn PDF document text
- http://okfilm.kr/userData/board/file/logazalejezil.pdfIn PDF document text
- http://tydafa.com/dafa/uploadfiles/20210908184707.pdfIn PDF document text
- http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/66773557212.pdfIn PDF document text
- http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/kikax.pdfIn PDF document text
- http://www.juniorcollege.cl/ckfinder/userfiles/files/68390423156.pdfIn PDF document text
- https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b03cb6285d---20696261312.pdfIn PDF document text
- http://summitremodelinginc.com/userfiles/files/sudimipolib.pdfIn PDF document text
- https://www.asoriofrio.org/ckfinder/userfiles/files/23022961809.pdfIn PDF document text
- http://tingchucontrol.com/Uploadfiles/files/31662181633.pdfIn PDF document text
- http://labuchedeberce.fr/userfiles/file/bojoliz.pdfIn PDF document text
- http://gemwishrs.com/ckfinder/stones/files/tibufamezu.pdfIn PDF document text
- http://shopphutungmayphat.com/upload/img/files/5493084671.pdfIn PDF document text
- https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b58daa4f3---tenom.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=nba+2k21+android+modPDF link annotation
- 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e019.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE019	25972 bytes
SHA-256: `a20ece6066b1f6b54b566898c6e233a9059faad2df02dc679aec22d64fa6779b`
`font_01_sfnt_off000122c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122C7	16652 bytes
SHA-256: `a88590ce5b565b9f4a14327935dd623b97f339c10ba922a5a0b0b56bb17c8cdd`
`font_02_sfnt_off00013a72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A72	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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