PDF malware analysis — malicious · 6dee17a2dd37f85a

MALICIOUS

PDF

70.9 KB Created: 2021-09-02 08:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 4480223e1454ce3961cbac65c8c9ac2c SHA-1: 4c5a64cbe6311fa8be05f118cb6bc7656e42198d SHA-256: 6dee17a2dd37f85a016d1dbf0c0c2f5503d27397bac895c68a75cc17a4e37ac8

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as malicious by ClamAV and exhibits characteristics of a phishing or malware distribution lure. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF structure itself appears to be a link farm, designed to obscure the ultimate destination of the embedded URLs.

Machine Learning

Nyx PDF Classifier suspicious score 0.4270

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://drafthe.ru/uplcv?utm_term=keynesian+theory+of+income+and+employment PDF link annotation
- https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/4fd3238d10624fbacf1e97b4b0abe3d8/mikogujatowifuzexu.pdfIn PDF document text
- http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b794fd1e5e7---pebirok.pdfIn PDF document text
- https://pasarangroup1.com/contents/files/jegirelufumurivov.pdfIn PDF document text
- http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc69095e73---numerokide.pdfIn PDF document text
- https://sport-jicin.cz/dokumenty/53565030569.pdfIn PDF document text
- http://turagent007.ru/userfiles/file/gaxovejubusevirijin.pdfIn PDF document text
- https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/a4b0ced1593921e916c3ec10c15934ca/gesepafalezekilijewu.pdfIn PDF document text
- https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/cd065a2a6eeea5d1464879edc5e10fcd/dozibipe.pdfIn PDF document text
- https://aftaplan.com/works/peepsparty/html/upload_files/file/fekisuvi.pdfIn PDF document text
- http://riskhedgetech.com/uploaded/file/1414712935609269a8d524e.pdfIn PDF document text
- http://quesnelbusinessnetwork.ca/userfiles/file/16875193140.pdfIn PDF document text
- https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6cbea90bc---87580841800.pdfIn PDF document text
- http://robertfeinberglaw.com/images/edit_images/file/3636218404.pdfIn PDF document text
- http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/levjol4gk11d253ssq14dh9en6/58452365506.pdfIn PDF document text
- http://timandlor.com/userfiles/file/rixixeleta.pdfIn PDF document text
- http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fee4e5210---94688949015.pdfIn PDF document text
- http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16081151666a5e---91075382270.pdfIn PDF document text
- http://cornucopiafrederick.com/uploads/files/garoxe.pdfIn PDF document text
- https://agatanorek.com/files/file/51399852882.pdfIn PDF document text
- https://mimpishio2.com/contents/files/41923573865.pdfIn PDF document text
- http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78361f312d---19112908953.pdfIn PDF document text
- http://sireny.net/share/files/16246239497.pdfIn PDF document text
- http://bettynblue.com/upload/fck_img/20210530/file/4280665313.pdfIn PDF document text
- http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceddb272a1---puxegadolobefubukelovu.pdfIn PDF document text
- https://nabsangram.com/userfiles/file/lowixisuzodo.pdfIn PDF document text
- 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d5fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5FD	16984 bytes
SHA-256: `a11cae5c12f2c3622dd2c3cee201d588dd328658cde61e9d077ccaa7555198ee`
`font_01_sfnt_off000101d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101D9	10988 bytes
SHA-256: `c028b22eb965a7b8f6b9907166bfbfff8eaa6612d267f2205b4607713fb9d13d`

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