Malicious PDF — malware analysis report

Static analysis result for SHA-256 695d62fbaddfc5d6…

MALICIOUS

PDF

94.9 KB Created: 2021-07-02 04:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f8e26076195cde31fdcec78a7d614726 SHA-1: f979a764904218596c89515a77cd502908cc9bd0 SHA-256: 695d62fbaddfc5d65690b4bf0d9e905999980b33ae65b6214692cfe5524309a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://www.tekkoo.net/images/library/File/84756844094.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/08o8qgigk4ftr461adps8s0sh4/26327500272.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/1ce393cbeafa2baf65e9057091785017/76845268274.pdf
    • http://irinaburmistrova.ru/files/70721606807.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/6269e127007643d5cd7a53e84de10919/moxulamipatevubijavure.pdf
    • https://anpheatingandac.com/nbloom/fckuploads/file/bosunur.pdf
    • http://www.edgartownschool.org/uploads/files/31431907729.pdf
    • http://diamond6ranch.com/userfiles/file/22605888966.pdf
    • https://lesartsdansmonjardin.com/userfiles/file/20210628234842.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/2ff2a1fae036d9bf86a84e8be64a3f8e/dejurokudanabuvunezuz.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f55357aa0c---23265721315.pdf
    • http://styropapex.pl/userfiles/file/mevenu.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/8ihvj24e9a05heaov6crjaivb7/xatalezased.pdf
    • https://mttrasportisrl.it/dati/upload/file/36701788637.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5992860885---64275767928.pdf
    • http://vintageguitar.ru/ckfinder/userfiles/files/vusoninatowuju.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/c127d7219a72fd2acc15a528f7f7509f/naxolodifufijikekubi.pdf
    • https://soudurelausiere.ca/upload/editor/file/33383638161.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086344e3268a---26603862938.pdf
    • http://oryginalnedekoracje.pl/userfiles/file/padarakijolaxekepezagon.pdf
    • http://smit-electronic.hr/upload/datoteke/4197608004.pdf
    • http://tpdw.pl/userfiles/file/15658704700.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/f78aeabaf3c3c9fc6311b7ce3ab5baf8/9290603822.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/4567afd6879e1747b708b0cd060f3eb2/54265493719.pdf
    • http://zaun-produzent.de/userfiles/file/jisovugukefizebikaxofugo.pdf
    • http://ankamet.com/userfiles/file/lafosanasit.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=kamasutra+a+tale+of+love+full+movie+online
    • 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_off00010df9.bin
b7cb3c6b6ee4123e13c0a201e059aaaf8b5b3dbe5b2b71bc090e52b71a397a22
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF9 18188 bytes
font_01_sfnt_off00013dd4.bin
a4139ca553797727a4cb3c092251978d8961d99020fdecfbe77544b440ed3bdc
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD4 10532 bytes
font_02_sfnt_off000155d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x155D8 16792 bytes