Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6f376f047bd5da…

MALICIOUS

PDF

97.2 KB Created: 2021-07-13 21:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 64605abbed907d38a6a04324ce610ef9 SHA-1: e814cb77f1fdbcdb40bc9dc75468f76cc4dd9c69 SHA-256: fa6f376f047bd5da8845ed5ff397de02d23a1abd86ca7d3371f983607e63c765
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs that point to link farms hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of these link farms indicates a likely phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9802

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 https://huntic.ru/uplcv?utm_term=past+form+of+forget PDF link annotation
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/33714d3e0b7c743488a2b060ae4328e3/8570109670.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/42019465260.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/dojamuxi.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/48010540990.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/3e4cd7dd2cd886991e59af838e5833a5/42655954609.pdfIn PDF document text
    • https://scapetime.net/images/website/user/files/togajubazovasef.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6eb64466c1---5915752945.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/guvisimolarewi.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c17c33bfa55---benotakobitidadogotuvotu.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e633cb6309b---64913129394.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/63801250839.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c9b1b3d15---gafelenejoxolabofodupik.pdfIn PDF document text
    • http://dmkaudit.sk/101/upload/file/1917133358.pdfIn PDF document text
    • http://lohs69.com/clients/82366/File/pikopidaxaxexoni.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/8fef7599ec31d4e45e264d5320a97233/vadegomofenozoja.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/3f5628a027f7bffbb3458ff35311e884/zutasolebowaneloderiko.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021061905563473499.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/5da5380c77c032278df8e352424afe3b/gusuto.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/d549461b863cc12014d85370317aeecd/13773595982.pdfIn PDF document text
    • http://sdds.be/userfiles/file/serezupimadamipuxopafupub.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160c5786ae7458---1763131218.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd66f72b4f7---15465286527.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/071744052787.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/xupitid.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF04 16520 bytes
SHA-256: 5e6d335c1f38bd22a6c5694f01a57af7fb0edc62381c99cb255999dbf0413764
font_01_sfnt_off000105f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0A 10316 bytes
SHA-256: f14d5376d3668f3bc3e28363210200de9b0bbddd12159f7e9e9f03691ed6e3e9
font_03_sfnt_off00013562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13562 3308 bytes
SHA-256: b3ee4ba270cd40a54d1d723b33545f4c44e6ea1969b3199c2bc44f8913b3dc0e
font_04_sfnt_off000142ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142AC 20384 bytes
SHA-256: 41b518ca72fedea080c3cf43342bbd24ad75b9c77851f0fb4be218bb7f3ff46a

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