Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dacf48bd75ad945…

MALICIOUS

PDF

75.4 KB Created: 2021-10-03 10:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: c18315d15fbeb4a9e81f8298d6d3f0a8 SHA-1: f03e32d96dd70695c96e781e6bad391da8a99d10 SHA-256: 5dacf48bd75ad945d6d299e0f138021163de18cc2027a76cbc41418f73afbcfb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links to various domains, many of which are hosted on disposable or compromised hosting, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL heuristics and AV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://neoneofitou.com/ckfinder/userfiles/files/33826049638.pdf In PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109230304585352.pdfIn PDF document text
    • http://divelife.kz/files/file/kerop.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/govonujatovuzu.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/5233fca36cd8c2466a4601e7a73848be/74401420612.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles/imagenes/bevopazuwiripatakesesaga.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/tutitevolilemid.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/vuvusututafegu.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/6014037994.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/zevezerozadipakanefaxuka.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///xibafutujunibexowujirase.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/samomorefidevi.pdfIn PDF document text
    • https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/nefuzumu.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/4gjk6nd01t1594n7f82vbdpnna/kuwan.pdfIn PDF document text
    • http://hcstonetw.com/uploads/files/202109221326596102.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/92051945337.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/lekomiwo.pdfIn PDF document text
    • https://konzolstudio.ro/uploaded_files/file/zunukazutemaki.pdfIn PDF document text
    • http://yibetter.com/data/files/xezumiwipeke.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/64197846918.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/aefa137e051e2ee54b12e125c61488f5/wejorifonawov.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/towununakosofome.pdfIn PDF document text
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/bokategizig.pdfIn PDF document text
    • http://santinitravel.co/files/others/82170285195.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=inseparability+in+hospitalityPDF 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_off0000bdfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDFD 10556 bytes
SHA-256: 37dc7144f6ca6bdbc9ce80e0361bcc4e07c1e89afc0346968a3398366f2424d3
font_01_sfnt_off0000d5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C9 19192 bytes
SHA-256: 62cdc273e9fee07783b606465fcdacf2afbee830371e8b20ab237270f42ee38b
font_02_sfnt_off00010824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10824 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1