Malicious PDF — malware analysis report

Static analysis result for SHA-256 2baed4ab86c7176f…

MALICIOUS

PDF

83.5 KB Created: 2021-09-18 20:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a5df3862c26a972ce883983addea6b3a SHA-1: d96fd67cc60ae013b919fd2a4119c61d76cf7cc7 SHA-256: 2baed4ab86c7176ff2955f6cf7d68e5c33ddcc1ce336aed609e694ea75929e41
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed to redirect users, likely towards phishing or malware. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common vector for further exploitation in PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://synerhu.ru/uplcv?utm_term=note+8+battery+issues PDF link annotation
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/46082100299.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/76164343436.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/vumalogipijiviwajopoveteg.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/wogexolivefolojes.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/edb6423ecf7a15d7d7b7b36f862c13a0/fumirunetonov.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa6816ae34---17601366165.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/75312484164.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/34116253290.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/58771426621.pdfIn PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/33258858987.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/lobavoguzanadavixukabot.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/meromusutuxorofuxok.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/54c4a96d053c7589671b66266aaed913/32082243695.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/35499965727.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/gabubumugeninox.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/64205820578.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/4rtru6h2pqt4he8t70baq04na4/dafolefoxeduzuse.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/11152983943.pdfIn PDF document text
    • http://candientuvibra.com/images/file/44676860132.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81594255855.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/debamaviviriwebasilusa.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/20095051196.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210910065408248.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/54213455771.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_off0000e1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C9 10492 bytes
SHA-256: 196b638d1c372fafe865a25b1098984c147b38e09746b146fca9f166f4a6bcc5
font_01_sfnt_off0000f9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F4 18180 bytes
SHA-256: 741319955758c4282153655c670ab0424b4df589fca64cd6fa27a2cdf4cc029c