Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb4c7f45b7755ed…

MALICIOUS

PDF

102.9 KB Created: 2021-06-29 00:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2e66b1b6d42239f12966b16a897cef35 SHA-1: 5e7824ae9a6de73679bc1130939fcae2e50a121a SHA-256: abb4c7f45b7755edddda80038cf50f1838898fc6686d015aef99a51b3686b903
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, pointing to numerous distinct hosts, many of which appear to be compromised WordPress upload directories. The embedded URLs suggest an attempt to direct users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://connect-senior.ch/uploades/userfiles/file/kotomawetobipokomaritun.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/9e79a9e37d5bbff5a95e12992b000fca/95220528116.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ocr4ae99mq9io4867c73r34cj0/tomenonaluvu.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfd156ce08---25007517070.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/67a51a995e624ee922eb6a4cddeee937/lomumotekuf.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/89ca3bfc27a6dc58863b7949b4749f76/poguzutusojoxofanosaken.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf73fc802e---sazajejedipefokalefej.pdf
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/vositemaf.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/e4i8ut6dp8paevvmrkktroq6ji/sutulogob.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81d61bb6c---84239233734.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/c6b643dbcbdde961e74dd13ad3e9097d/ririxirezifemida.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/aad788f6baf5fa925744984c0a58947d/pilaxedodavanepolazuj.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609473dc44071---fipaxoditemizagu.pdf
    • https://cafesca.org/ckfinder/userfiles/files/55336008791.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160879732bfcbf---74324047422.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/22klr6m0pmdi8va3hh9o819r48/beritogizulesor.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/7378d2e079b65b910fc211e4335f5469/2401885742.pdf
    • http://bundoreh.com/fckeditor/files/file/vinudifopawalupaxaz.pdf
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/e1ut6onkfss30ka6i9n3n20a35/wujapimavobibudatasega.pdf
    • http://barksdalereunions.com/clients/869108/File/modowizepo.pdf
    • http://www.fashiongale.ro/userfiles/files/10516039729.pdf
    • https://efsanepin.com/calisma2/files/uploads/58871654945.pdf
    • http://sequoia60.com/clients/875776/File/jolipibenolavug.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/def7270cf2330db35af30da905ab80a1/setida.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=best+college+football+over+under+bets
    • 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_off00012dc0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC0 16792 bytes
font_01_sfnt_off000145d2.bin
fc4837cb4812ff95b08fac928f5b69e6c63b0589122d0e031269d1266fb5e82a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145D2 17912 bytes
font_02_sfnt_off000174e9.bin
7bbb387d6fe1f1a1f465de09d71d144c3a854912d956543c0f7d6567fa8004bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x174E9 10920 bytes

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