Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2094502b8545bcf…

MALICIOUS

PDF

114.0 KB Created: 2021-07-01 00:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 03507cebac89364fc5af73fbaf2cd4c9 SHA-1: 9c934e946a24bffc50c11b04b4a762cb1805fdbf SHA-256: b2094502b8545bcf451d5261cb2cbb5e28fe0a46672aecefeffbd6aec65f5df0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. The primary purpose appears to be redirecting users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the structure suggests it's designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

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://irlanc.ru/uplcv?utm_term=whippet+puppy+cost
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606da5935a405---waropidum.pdf
    • https://nada70.org/userfiles/file/40792292699.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/sicoq1nghsu2be0g9cmoo6rqfh/78733838605.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160715f2f2c67f---vedesijubegasesaririj.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607911196b249---64315567501.pdf
    • https://mfdesign.hu/files/file/87430541927.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/ad1f11c2775d9db66c050bd471785332/9953642840.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/bf4b12d9fa030dcfcfcc414127b232af/xomawafasulesededije.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/aba5918ad0020110ac4494074a4b4bed/46072242481.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ff77ec2df---gumajekiroderonabij.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/b794f2528c6671fcb2d49a78258636af/gejijoluzapeb.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/b207ae9aac59ca65ec2d78c6a716bf00/25569572750.pdf
    • http://apvn.info/userfiles/file/xikapu.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e40a29bd4---seguxikedafofuxisukibu.pdf
    • http://deauville.ru/files/file/jiwarolesuwesiziveba.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/ospvg90a2o8nb4r09ccjaf15t1/zafirorinavotebesow.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cacb270d97---zumovubudosarorape.pdf
    • http://seanmore.com/userData/board/file/35754079577.pdf
    • https://taevlingar.se/images/pages/file/desuwibutixuwuzobunazeg.pdf
    • http://anbao.vn/uploads/userfiles/file/19190794789.pdf
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/69b1c74ca8036a3b5453939c1b40748c/renodemivofu.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/cukbligc15u5c1758c5eu1gs12/xomerezelu.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/g134ljolo9di1i83p0pqd8n692/gubivaresowutalasalaxeli.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000146e6.bin
17dab69886bbd3ec2a6b7f0b1d65c3601f0d4afd9e3fe3dca6a26fc3206f9cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146E6 16520 bytes
font_01_sfnt_off00015d65.bin
26090292ff3fea52022dfe95245775b624abf7a399df2e854b6ed1e782fcbc6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D65 17568 bytes
font_02_sfnt_off00018b26.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18B26 16792 bytes
font_03_sfnt_off0001a33d.bin
327ccc7fa0a582fa849d7bc4b86ca924be4953f80dbe03294f96a529a5fe3b32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A33D 10264 bytes

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