Malicious PDF — malware analysis report

Static analysis result for SHA-256 68789fd075608d35…

MALICIOUS

PDF

79.6 KB Created: 2021-09-16 21:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0c96d84a5c700794044635a3c32e6a6a SHA-1: 0a4dad2c0ce9595bd281565d45f17258f948ef55 SHA-256: 68789fd075608d35691fd91353e8645f58da5a7c9ee73ed15f7fe7804789adf6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://philabc.ru/uplcv?utm_term=madalin+stunt+car+2+top+speed PDF link annotation
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421646d053a---pizeduwategusogokuwul.pdfIn PDF document text
    • http://ipea.kr/userData/board/file/gefolomabave.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/zimum.pdfIn PDF document text
    • https://artenika.pl/fck/file/tojedonubigoladorawa.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/lepuvilovubogepo.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613514fe49b5c---dezoxonij.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/zixepukopanewudodimij.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/zenozamumud.pdfIn PDF document text
    • http://xinshifm.com/userfiles/file/47117747116.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/duzup.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/71923551199.pdfIn PDF document text
    • https://miltonmattox.com/userfiles/file/71375967350.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/rebaroxosavomiwisibor.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/78143008664.pdfIn PDF document text
    • http://sportyou.fr/ckfinder/userfiles/files/62927014972.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/15a07106e16c48b879de670776cbba32/nusosemekobe.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/drke1f2dj0g5bc61c0gbqqmeq3/jadakifu.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/95388108533.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/33209714489.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/wekujesejozugopabub.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c22e8b2b3---pixagutudujuxasiniroxese.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/10024309245.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161408182aa54a---74362452305.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/71278767503.pdfIn PDF document text
    • https://grupo.iberia.es/js/ckfinder/userfiles/files/dowixifiz.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613387ca0b698---99314785190.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/vejisonurozagosebe.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_off0000d436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD436 10720 bytes
SHA-256: 7d9bbd5073816b5dd83bd1e08f7549f7db91ad562eee6e5c94de441335f21e77
font_01_sfnt_off0000ecfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFC 16760 bytes
SHA-256: ee9150458c8e031050ca75474b756ea95ae5ac9211d7f51ddaec60432a77594d
font_02_sfnt_off00011839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11839 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1