Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d179acc5ae93d3…

MALICIOUS

PDF

74.1 KB Created: 2021-09-06 09:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7e6e712a32db2f843d19165948c3036c SHA-1: a10f3b7df141e8d0a70adbd402f41c565722391c SHA-256: d6d179acc5ae93d3c6da914e39f1f13c259909d026c6f547cc571884acea740c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories, suggesting an attempt to lure users to potentially harmful content or phishing sites. The presence of multiple links on disposable hosting further supports this phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/03676ebb3d4c1180311ce91e74f81f52/34787344463.pdf In PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608752bf13d81---93465587546.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/376955011.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/a01483ad252305b35e59db61c542db49/buworusorit.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/juxumisel.pdfIn PDF document text
    • http://greenhere.cn/upload/ckimg/files/202108160844494741.pdfIn PDF document text
    • https://artbynela.com/uploads/file/19603360799.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094d4ae297f1---lijogel.pdfIn PDF document text
    • http://honghuibio.com/d/files/gamilenajogusodukibazukeg.pdfIn PDF document text
    • https://andrejc.si/files/file/85093663665.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160876a7f950cf---39241476830.pdfIn PDF document text
    • https://euinsuti.ro/app/webroot/files/userfiles/files/45457355288.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/78796117628.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/sosumabotiwaroje.pdfIn PDF document text
    • https://frontivo.ro/userfiles/file/98317442998.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/84018391607.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/434f51b39e793c584db2fc137f46bcbd/98869028490.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8514d7d299---wugunudokutik.pdfIn PDF document text
    • https://mfdesign.hu/files/file/sugisokuvofogima.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608286869a2f0---41459878162.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/poselenivolonubekan.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607fdd9c5ec4e---tonibanapex.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a8558b090be---molikolegipuxarizijeret.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/89282416083.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/9338764599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=sentence+types+exercises+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD880 10576 bytes
SHA-256: e88d6d0506fa070a2675493b24fa170026c023397f042ab281c41ce991450dc6
font_02_sfnt_off0000f0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C7 16476 bytes
SHA-256: 217dece3ca0bab9914d7c21f0d0412d5b94ca2dcb470246c45bce6607fef85d9

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