Malicious PDF — malware analysis report

Static analysis result for SHA-256 8580c504ff4c1ec1…

MALICIOUS

PDF

86.5 KB Created: 2021-07-03 02:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c9979fe13ded34f61122a93d8b395cf2 SHA-1: 70fb0dad587b050a198b384b3edf3f0151060bf4 SHA-256: 8580c504ff4c1ec12c9ca8aeb25dec8c25f5d2988e0fcef1d14fae6a61bded02
112 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The heuristic 'SE_INVOICE_LURE' indicates the document's content is designed to trick the user into taking action, such as clicking a link. Multiple URLs point to compromised WordPress sites, suggesting a pattern of hosting malicious content on such platforms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac61b9f1795---39611851913.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/cvebb3f2r9bndc43plf4c9hgl6/10196700142.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c1b244f6c---jinafevojevesefitibupi.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/0bcbdf3d76ec2754880f82994ed326f0/puwemuli.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1db47332f---30819647741.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c39817301f6---55917860958.pdf
    • http://flemingfamilies.org/clients/8/8a/8af36a28baf44bfc7b8a7004fb4eaede/File/74997283716.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/2b34f4c00119b754596522c06648b337/82091591051.pdf
    • http://twxcd.com/img-aim/files/75798690156.pdf
    • https://callmarkinvestments.com/callmark/files/9192388566.pdf
    • http://divapharma.com/uploaded/file/50220481840.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a99a6ed2c3d---13031970921.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4d179fd03---mizaritosi.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/3bb65a4d7258d04caee92192ff2df22f/53219491364.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fb5e78703---jamarubonuxemigewepusawa.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/f68f8dfb758672d0be5684383db47a07/nelisexor.pdf
    • https://perfecthospital.org/FCKeditor/file/8391219781.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa7e463ed8---parewamasolobuneviwotumaz.pdf
    • http://aucoindeshalles.fr/menu/file/vivivibefevapu.pdf
    • http://kimkhimientrung.com/uploads/image/files/31318552393.pdf
    • http://coniperfumes.cl/js/ckfinder/userfiles/files/78870070910.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f96955ff7---jemawifeweluzopexepukim.pdf
    • https://sjalikave.hu/pictures/file/durilegepejemaraweg.pdf
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/96283566084.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/68d493b2fd5fd3a8d3bf3a9c411b8038/navogalawalikegafij.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=trading+profit+and+loss+account
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd2.bin
a132c07faca2d05428936b190b3576ca19262cabbd0b971e73c9b7d403934839
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD2 18312 bytes
font_01_sfnt_off00011c33.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C33 16792 bytes
font_02_sfnt_off0001344a.bin
01a5e9d0568b57e0212d3e5de59a01924d978101aa029bf97512f6e4af91ec4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1344A 10724 bytes