Malicious PDF — malware analysis report

Static analysis result for SHA-256 b018d560d3247669…

MALICIOUS

PDF

86.3 KB Created: 2021-09-17 13:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 12dacd68172f6aaefb4eb33cebd8e6d7 SHA-1: 11f58cf86c453806644cc528093abac174cfb84b SHA-256: b018d560d324766948673b7800ce4a4969dc326aba9435f1f65963cce4d5331e
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or redirection scheme. The ML classifier strongly indicates maliciousness. The embedded JavaScript likely facilitates the redirection or further malicious activity, though its exact function is obscured.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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://coretry.ru/uplcv?utm_term=how+to+share+inbuilt+apps+in+android PDF link annotation
    • http://gestioniarmatoriali.it/18765442262.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/52fbc1ad0457536b9d2028e58d0cfb77/tezogurimileronu.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/25058902825.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/34737424871.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/pinagibezisixegoli.pdfIn PDF document text
    • https://ewt.cz/res/file/wopuwujizanarodogo.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/desafamarezixirutari.pdfIn PDF document text
    • https://x-software.cz/data/file/36657046757.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/161308eab2f537---82762139862.pdfIn PDF document text
    • https://sanidom.pl/img/file/34004908069.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/44890656136.pdfIn PDF document text
    • http://rutka.pl/media/upload/files/0d24533c352439b7928d2f53bf8ab29a.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/80681335623.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/zitibumem.pdfIn PDF document text
    • https://noventa.cz/media/files/file/11565061864.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130999e395bb---tafijumaxokikamexifupob.pdfIn PDF document text
    • https://seltec.io/images/uploads/files/xagawopubotusoxax.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/xufipodevuvilonuf.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/mozawetaziradetazoxaxig.pdfIn PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/10157920927.pdfIn PDF document text
    • https://led7.ru/file/wejipofimibeduvilosido.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/daginera.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ab5ce8acc---xatuloxuduxaledawavig.pdfIn PDF document text
    • http://vonschickenfremont.com/uploads/files/falawe.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613259cd9c40c---mafijimi.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_off0000eca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B5 17592 bytes
SHA-256: 83aae3b69c45fa74ac31d5865d570fc72064e3b1c13ed199d6cc5c1bf732f4b0
font_02_sfnt_off00013297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13297 10808 bytes
SHA-256: 6a4eae18f850761fa098aac6d297cf9b8dd41346100e32d0d99750fd57ec34c6

Open this report in the interactive analyzer, or submit your own file for analysis.