Malicious PDF — malware analysis report

Static analysis result for SHA-256 0693fc34ceb95da6…

MALICIOUS

PDF

73.6 KB Created: 2021-09-01 16:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9a0c671dc48925ac0a0c7bc577f6bb29 SHA-1: 151ac669c7caf3a5312177f8e861c7d5ea4845ad SHA-256: 0693fc34ceb95da6e0103834b5acdaa5d563b1356aab76229c3dd9e5ff9bddd4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised CMS upload directories or are part of a link farm. The embedded JavaScript likely facilitates the redirection to these external resources. The presence of a link farm on disposable hosting and compromised CMS uploads suggests an attempt to obscure the final destination and evade detection, characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 https://nomylo.ru/uplcv?utm_term=8th+grade+science+questions+and+answers PDF link annotation
    • https://parklanehotel.asia/userfiles/file/34833313418.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6bb013ab8---golevase.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d42546b41---45824431752.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/sogelasaximopemumalokilej.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/0621f400cec3a5fb2ee1f03298d6177f/83555799687.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021061921151056.pdfIn PDF document text
    • https://regiefranchet.fr/userfiles/files/31853124646.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/29ecfcd6d9226984dd1865e0fd7f61b3/2626062568.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/15c919e9a99776d294facafe1c061b59/41257664304.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/82691743064.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/09c36b88b685af15a5a93bd757e476e0/risolojawamalovetuwo.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f1bbdc68093---wifokirired.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/2201507302.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/79774038890.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/takejolazoven.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f43f6a51e---77624424268.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b8755026062---fafavi.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/nuveku.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3e2f7161c---namunetajodate.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/32533151743.pdfIn PDF document text
    • http://10kshot.com/customerinterview/ckfinder/userfiles/files/jevaratufogejamu.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/3829b6840e88d9ee7b4665673b2430eb/kisubigizedaje.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/39140683701.pdfIn PDF document text
    • 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_off0000bdf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF9 16136 bytes
SHA-256: d01fc3cd400b01de0ec69ba8107f3df55ed31cf944b9fde153547f3d8eb27973
font_01_sfnt_off0000e697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE697 11048 bytes
SHA-256: 19295b9068adf1e87ea74d7663dda8bab98558a5e5c15947fba006be51d7e1dd
font_02_sfnt_off0000ffe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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