Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce67298840b19b8b…

MALICIOUS

PDF

87.8 KB Created: 2021-06-26 15:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11d65b7eb039d77ce4b55dcbce867ade SHA-1: d3591d87f3207de06e89e21ba32a0824a9f2a4a5 SHA-256: ce67298840b19b8b0a265f77c19d2c2fd005fd6dca86cf4a2a5c17d1f52d1f22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, which flagged it as a phishing trojan. The document contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to redirect users to malicious content. While no scripts were directly extracted, the nature of the links and the 'link farm' heuristic indicate a probable intent to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/aeq5t4cvrcq06nmkm5k4h1g194/51977778147.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b426e7177d6---mesabidinizojujofamelul.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750c77023e3---64567770033.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/9rvh5cqv7ghasnoek0enbrig4l/10328631708.pdf
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/leloverigakulen.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b2661ffff---vemasizakalef.pdf
    • http://myblindz.com/fck_user_files/file/14179063135.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b241f7c6ee4---99698704194.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882784114b1---zaxezidirigogepotur.pdf
    • https://actorconseil.com/files/file/letupiwavefowijoruru.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/f726220f75d2dca772a6b67a5295b99b/wonidatavolewivajuvit.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d62ab47eb81---61231079760.pdf
    • http://bpabv.nl/uploadfiles/file/jodunevodujex.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fab9eb931---4073234198.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/u7v2k0r8fp8gcail7mkqbqeb9k/rezovogufane.pdf
    • http://npas.ru/pic/file/85437510349.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160721cba2e53b---vozaxotanimevitiz.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d601c4be31---76215218585.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a54cc911d13---karuvavoditozeruwago.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609857e243eb1---biniteketujajeraguzu.pdf
    • http://denki-shonan.com/uploadsfile/19458103144.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d01702a4d7---82141570639.pdf
    • http://ccswcd.com/userfiles/file/xefomimef.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/2a21559861ece35e2284ab867331e060/rogufowivedujowelonog.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=calories+in+thick+pork+chop
    • 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_off0000f433.bin
614ff3fced86ea5bb9115c00f29cca223363daf121b2e40ebc42ee885427f2ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF433 17552 bytes
font_01_sfnt_off000121b4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121B4 16792 bytes
font_02_sfnt_off000139cb.bin
fe02f60190e4d6512b157797d26720a42cbee428a520cdb3323b4a569b9fc0a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139CB 10596 bytes

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