Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e30df1bb873bc46…

MALICIOUS

PDF

69.9 KB Created: 2021-09-26 23:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1a4afa036028c8e4e112db1638330f1d SHA-1: 6c287d2d3c0e698c63b1fbd2ef0a44fc36433c86 SHA-256: 9e30df1bb873bc46cb4a2dd8621aa7f33e441caf55fff5f6b9849272907801eb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and a large number of external URIs, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware download sites. The embedded JavaScript is likely used to facilitate the redirection or exploit PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9ad027c66---rofapiziraramir.pdf In PDF document text
    • https://partnermind.cz/images/files/ziburozigameze.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/oj5j3glaervc2uln222leka3g5/98071060062.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/mirusakovate.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/nusogalokosilizo.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/mewigun.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/xorunamafegulomizotodavep.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/ofdmg4a6g0edm5gs05mplgjins/laxojosinixoji.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/5603603737.pdfIn PDF document text
    • http://www.abcklima.hu/data/editorfile/jonupebukojosapuzimazuxe.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614664485e798---8378717908.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161421d585003b---jajefovizelesifidu.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109222003562475.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/vubadapelove.pdfIn PDF document text
    • http://rrarental.org/upload/file/ruritanolixotogakej.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/14806366654.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/67222139709.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/pusejozupes.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/79993890703.pdfIn PDF document text
    • https://mashura.co/userfiles/files/48219880413.pdfIn PDF document text
    • http://valentine.tutaylamhet.com/storage/ckfinder/files/wavazuburus.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210903072757.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/pafedipopoziw.pdfIn PDF document text
    • http://www.seminariomenorvalencia.com/admin/lib/ckfinder/userfiles/files/sosavedikasalupigodidebub.pdfIn PDF document text
    • https://medbioplast.com/klucharnet/images/file/zoverap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=why+is+my+play+store+not+downloading+appPDF 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_off0000b1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B9 11032 bytes
SHA-256: 18864ea9ce28e4910bc05df11839a9ffe2aa453bf2577a420f062961c187c04b
font_01_sfnt_off0000cb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB07 15468 bytes
SHA-256: 20101a653e13467dac2ff06b3a3d7b0c094f9f9b2e235b1fbbca78361ad9256f
font_02_sfnt_off0000f217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF217 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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