Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6fc9695ec205de9…

MALICIOUS

PDF

78.1 KB Created: 2021-09-12 17:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 38af436964fdae0c85bf30ed164dfb65 SHA-1: 6ec274d4ee64d4b00d1addfd2f070ca7d37e2e26 SHA-256: f6fc9695ec205de9558b015db59412a406b6edff08d19ce97829cc69f6eec6e0
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7432

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=english+movies+online+watch+for+free
    • http://textingrights.com/userfiles/files/7336624729.pdf
    • https://demircanticaret.com/userfiles/file/vivusifusakunuvukikuviru.pdf
    • http://sarljarry.com/userfiles/file/47842324180.pdf
    • http://nonstopsushi.com/uploads/files/80069811254.pdf
    • https://guapa2.com/admin/fck/file/soziketutonoxagawiku.pdf
    • https://uroci-kursove.com/userfiles/file/41950882031.pdf
    • https://recapress.com/ckfinder/userfiles/files/30452956605.pdf
    • http://avandcie-energy.com/ckfinder/userfiles/files/33793152195.pdf
    • http://sparkpro.lv/content/file/kopisofedogasolimugi.pdf
    • https://eletvital.hu/uploads/files/50783622137.pdf
    • http://thayloilocnuoctaihanoi.net/upload/files/10068240291.pdf
    • http://vantaidongsaigon.com/uploads/files/5726770097.pdf
    • https://muguet.fr/sites/default/files/file/91210252964.pdf
    • http://kronospan-mofa-hungary.hu/editor_up/galetudimosirafod.pdf
    • https://cissud.com/uploads/ck_editor/files/33287030607.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fed1814979---kagepakubofisivibuvaj.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1c858c22a---xutopexalirol.pdf
    • http://amadpich.com/userfiles/file/lamebedezowa.pdf
    • http://xn--80aap0abfiql8h.xn--p1ai/admin/ckfinder/userfiles/files/terudazuri.pdf
    • http://bkmarine.net/ckfinder/userfiles/files/1631339796.pdf
    • http://klpa.net/userData/board/file/mexir.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb9a5e4b7c---retavizadise.pdf
    • https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/23108829491.pdf
    • https://ip-kamera-rendszer.nuttydog.hu/ckfinder/userfiles/files/fuxoxoduzedud.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f97c.bin
5405041d4ea2a0b6ad50cad6a912aa8648dd3566d96a28580cc49f705697861a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF97C 10916 bytes
font_01_sfnt_off000112a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x112A0 16792 bytes