Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd297d6098d39418…

MALICIOUS

PDF

68.7 KB Created: 2021-09-19 19:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 58d1c9ad5397ea0707c5ed7f1b615183 SHA-1: 56e7d3a2d1a82fbf11fd3fabbaa27728ab7b5b14 SHA-256: dd297d6098d3941885ae9f3d0eb560cf545c8d69d61100df9f93ef78a8737432
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as containing a link farm and was identified as malicious by ClamAV and an ML classifier. The embedded URLs point to compromised or disposable hosting, suggesting an attempt to distribute malicious content or phish for information. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://casinodanmarkjackpot.dk/userfiles/file/zebuxalijagaritorupi.pdf
    • http://sklenicky-obchod.cz/web/admin/fckeditor/userfiles/file/wulasipodikuninuvimujobex.pdf
    • http://devitohomesorlando.com/userfiles/files/37495976181.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144fa0791800---10455706533.pdf
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/8129241510.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/ef8ead80318d8f8af2978eea04b8e5a5/nobisudafunakolozosawa.pdf
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/patodeda.pdf
    • http://kangshi-you.com/uploads/files/202109180335445774.pdf
    • http://culfordequestriancentre.org/UserFiles/file/85080800218.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140584917880---83645249910.pdf
    • http://kehlux.lu/userfiles/files/rubasakew.pdf
    • http://numismatika-nbkpdy.cz/userfiles/file/wobekusipewiwatigipijad.pdf
    • https://clinicamanila.com/ckfinder/userfiles/files/roxesokujafozonaze.pdf
    • http://transbur.ru/admin/ckfinder/userfiles/files/57498354224.pdf
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/giwajegazowasimitexe.pdf
    • https://olympicwroclaw.pl/zdjecia/fck/file/35318764708.pdf
    • http://www.mariabeckmann.com/fotos/uploads/files/nejopi.pdf
    • http://tlumacz-francuskiego.pl/userfiles/file/dizix.pdf
    • http://henanshuangxin.com/d/files/jejukufu.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/2912776247e1553e48ce09eff15b3038/jusuxamajukugezusixego.pdf
    • http://charontrade.hu/data/file/69656388370.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=baseball+superstars+2020+mod+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE3A 16792 bytes
font_01_sfnt_off0000c64c.bin
a58a8147cf5ed557901fbea79abdc85f38a5f4637c79a37147eccb83d609e40d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC64C 15144 bytes
font_02_sfnt_off0000ec7c.bin
678b3d08559441b306b27d3c7b0e35ac369f5f7c7e150c1bd49410652da1d8dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7C 10984 bytes