Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0edcc0167be642b…

MALICIOUS

PDF

84.6 KB Created: 2021-06-30 21:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f0ed5b6451fa298e1805c9d77778998 SHA-1: 214b99286492b42c33fed045b93245c9eecca902 SHA-256: b0edcc0167be642bc9575242b9f405288e60211429bac33377c42683c851fab0
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs further indicates a phishing or spamming campaign.

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://synerhu.ru/uplcv?utm_term=tablets+to+get+periods
    • http://tafgambiatours.com/userfiles/file/xepeduj.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6fc4fd44cf---numivifopofanududifebez.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/433a887f1757ff769aeb5ffe70a26bb8/99571257862.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/d0307c3785bae213704743059190e10e/12881517244.pdf
    • http://precedent.by/_newsite/images_from_html_editor/file/daxexejanogokatajepeguj.pdf
    • http://cloverpark1959.com/clients/51168/File/puxugakoju.pdf
    • http://delvalle68.com/clients/54584/File/dajazipasapari.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a456911b5df---fuxumutedusiwek.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/a4188e1f2ffab64fa5ecfe341c36a057/ratolukikenovezuwud.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b948614a625---44964034232.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/200f7aed2a4f71574db36460ec820dc7/lojugesedusetazibodofiza.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160d847127fb45---89624504238.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/64e8d461d577b83c8f74a0da88680d85/nevumimubaxebaligijigupu.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b69a0ee72cc---81312982727.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/jbuniqbn6bi73la0bhpdmke301/faxilelixosojagobozuruz.pdf
    • https://isabellepieman.com/userfiles/file/pekuvetifojadavuwaxo.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/4478bda2fb72230354bbc68494e82cfb/bivunobibo.pdf
    • http://gagutp.com/sa_upload/userfiles/file/20210601204648.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/9b0c8dec2bc5690bd664d688e26aca96/12404026102.pdf
    • https://cabsfromheathrow.com/userfiles/file/nufukof.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/016fc64de377a7cb33555d6770917938/9681201892.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607529685cbce---dojimigubutadilaniwa.pdf
    • https://bawwabatrizq.com/userfiles/file/nopaxupomenupefidozux.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608508a3e1306---81003598899.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_off0000e959.bin
88ee483cf3c96d3db4b26367a249efd2b19edbdbdb06ba339eb5e3d6ee7d3218		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE959 10564 bytes
font_01_sfnt_off0001012b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1012B 16792 bytes
font_02_sfnt_off0001193d.bin
de144d77fd464396cfc4d877f76a2cc05ceb2a675d21e79fe5d95ecb7f67a91c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1193D 16820 bytes

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