Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e42c297028d649d…

MALICIOUS

PDF

80.5 KB Created: 2021-10-26 00:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: aecf766e454b98f9bae2c135cbf2d3fc SHA-1: 89018df473700c43b4dd5c2117503929d25e1c28 SHA-256: 0e42c297028d649db4d90deb4bc257a908c9281d634cdcc35f8375cd09c4c9ca
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and a link farm pointing to compromised CMS uploads. The embedded JavaScript likely facilitates the redirection to malicious sites, as suggested by the PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The presence of numerous unknown URLs further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dorapeyzaj.com/userfiles/file/vapodukinamipokebejex.pdf In PDF document text
    • http://krakowska98.com/zdjecia/fck/file/57743499850.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/21089756143.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/xenapegojefarobasim.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/8440520981.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/161413b9ae1f65---93228061126.pdfIn PDF document text
    • http://hladonural.ru/upload_picture/92164126340.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/72534396408.pdfIn PDF document text
    • http://pellevah.com/upload/files/peluki.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/nudibuwapuraxojovixebono.pdfIn PDF document text
    • http://etkenkalip.com/files/niramub.pdfIn PDF document text
    • http://darec.sk/files/files/78104534465.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1614ba1b5969fb---60165621700.pdfIn PDF document text
    • https://mhreng.com/userfiles/file/39207666344.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/voruvibowivaresatud.pdfIn PDF document text
    • http://hfnhsw.com/upload/files/72474051494.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/22049328056.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/9627717981.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/fa87199969f18b95b5b2b14eecfaf21f/gizusujuxebisirezewakes.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/xebitoma.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1614d6b4c4433a---65578975453.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/foporofel.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2ace3f546141f8742a4be97130c16492/51045508302.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/senujibejarivafuref.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/81244514315.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/TxADE9PCSUw/uplcv?utm_term=matter+can+change+from+one+state+to+anotherPDF 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_off0000d68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68C 17280 bytes
SHA-256: 577e28eb0d69aedd40eb38d8551c6be4c3865c4e97d3500efd82dabbbe646959
font_01_sfnt_off00010368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10368 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7F 10636 bytes
SHA-256: d9976dd7fdfe0b676ce195b5fb3616880f9fd912a5ecc45ba276c5dd6bfebc63

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