Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0f898d63b61f3d…

MALICIOUS

PDF

83.4 KB Created: 2021-08-06 16:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 57d3442e4580fe209c6cc5546ef95e82 SHA-1: ea6965001c9dd16ad7826cfb0c7aa7cc81029ffe SHA-256: 8f0f898d63b61f3d38042a072b8cd2384c2c6c6cc3b03ce766fb73999c0eb271
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to direct users to malicious sites. The embedded JavaScript likely facilitates the redirection or further payload delivery, contributing to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://prestizhstroycompany.ru/SITE/files/editor/file/81757506090.pdf In PDF document text
    • http://zonwering-belgie.nl/ckfinder/userfiles/files/lunidugifototasadividotot.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com//app/webroot/uploads/ckuploads/files/15957339785.pdfIn PDF document text
    • http://conservativista.com/js/ckfinder/userfiles/files/45836916333.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b128c6cfe89---sifugoseluxa.pdfIn PDF document text
    • https://comtraining.cl/userfiles/files/rovadatik.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/34353167566.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/wilod.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/48284534935.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210719201035.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/d6qfhjthe7pn2uq0fhff482r27/5407762346.pdfIn PDF document text
    • http://nkcophs50threunion.com/clients/0/01/014062e559e26c1cf0711bcec4e573ae/File/ragumawewigim.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c43c6e9406d---30580876830.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/95309435408.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/geb2g3257mp66qpv24g0fa64vk/95988579729.pdfIn PDF document text
    • https://termoformat.md/img/files/wixawejozogubopu.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/a475a895e1de53394a8313f74ff69e26/zosepobijisiwawo.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/vafugumomem.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/jibuzamotodetige.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c9a9e02a2---27258179568.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=dsl+light+not+on+optus+modemPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AD 17192 bytes
SHA-256: b4f04edc112394768a8dda9b29031ce3541fdb8e152961f7b08446fb4c465a66
font_02_sfnt_off000126df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DF 10680 bytes
SHA-256: 54f6eb98d226b0cd5598b0e35f403b9b57461dbe333725e0976b4eb300932021

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