Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2bf95dfc9fb66b8…

MALICIOUS

PDF

85.0 KB Created: 2021-06-29 12:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8dd8283f82586ad815e84d33bea91752 SHA-1: 6940c59a7beac0a4b0ad3f77e3d11488658f6c5d SHA-256: f2bf95dfc9fb66b857d071b2e564a9e047168845d51b368c40b9f5fa8d8ed93a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious sites. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to its deceptive content and potential for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://garglob.ru/uplcv?utm_term=exponential+and+logarithmic+functions+worksheets+pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c64b000e795---siveliketijupe.pdf
    • http://denki-shonan.com/uploadsfile/wotalojorilatagatopugefuz.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/ae8f4f4cafab6aa248f8859631535671/32326633882.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/btdogrj6780um69frae2tpbukq/wulawubafox.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/sqv2l7u5ermvphoq3f8gvi5ps2/zefaronelabubakipol.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d26bcb41268---kugotipavowaparabisurirad.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d25a9ef13---kimexavedasikip.pdf
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/30000089601.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/n91dejcjgud552nsbedi1l4g9l/92044639344.pdf
    • http://omonetach.pl/foto/ilustracje/file/silixewuzomarijebedado.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160758cabb0243---dojiluxab.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608632bcdcc37---woradikavefu.pdf
    • http://accessprecision.com/userfiles/file/nemenexokiwuvazibaninineb.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096c14180e41---gorezojapow.pdf
    • https://nikosdimos.gr/userfiles/file/pujokimeda.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc543ac58c---16416412200.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8646d6082---fixutiwimawanuxetekagup.pdf
    • http://kovacsoltvaskerites.hu/images/file/pukem.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/m7tfloiara0fp29h8b0qu6mqub/53526027259.pdf
    • https://esprimagroup.com/userfiles/file/4557478599.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/d5140f657777a93ff7bf1f209ab4023c/koxapaxazovalitesevapasa.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ecea50360---fejab.pdf
    • http://tasteofruraleurope.eu/upload/File/81244713034.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/b6efbf548ad1f408b728270bd32dd749/30582876081.pdf
    • 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_off0000e510.bin
9559a132b1b6b286eb4eaffe1b83463548d78a6002bf9daa03e36595b5059b36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE510 17552 bytes
font_01_sfnt_off00011382.bin
810ca842c2621190ca11b3a87dc09f21c41874685bf50cffc90a46e4706c3b89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11382 11428 bytes
font_02_sfnt_off00012e2a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2A 16792 bytes

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