Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8807f7aff20b55…

MALICIOUS

PDF

81.1 KB Created: 2021-09-05 00:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d8ac2558894861ddbc0b262e37d2012c SHA-1: f9268061b44197bc4dbac93a4f0d17eb797416ca SHA-256: ff8807f7aff20b55d711d59528137568a902ce226f5ae28ffbfc49673521569a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with the primary function appearing to be directing users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://nomylo.ru/uplcv?utm_term=moretti+spectral+theory+and+quantum+mechanics+pdf PDF link annotation
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/khe5usei59pqrrmqjdr8gsc3n5/niposisipowog.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/gavujuniwoloxasezuzi.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/958be0568136c5217b581c4d80b01090/xufuwivezofokere.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/3isl8ogadidln8qupkk2njjjlv/legoxotosowunozokotuga.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9b8276911a7ab862e60726b6efef2e45/55097519168.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/fozoniwasigum.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3488c36bb7---49077603881.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4ab08653b---18693928357.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/2aea57072735294b61eccfb432b5d8a4/sosegifodizefabefusojor.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1611d9e9b5bfa4---zovemeg.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/mazidufotevezimobozil.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/9ce42788d75bbe739914f594b9cad2ee/22770923028.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/mesizobesudumekelolagip.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773bc44b061---82979906351.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/1996389447.pdfIn PDF document text
    • http://fairmonteast1969.com/clients/876766/File/zukukosoperekuno.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133e378abc36---11894270971.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/26522000406.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/74250539144.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/161327bad8ee44---nufomexekirelazivasuwada.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/juderibogupifupanowu.pdfIn PDF document text
    • https://www.studiorosaliabusco.it/ckfinder/userfiles/files/lizefonobojolupozap.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

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_off0000d0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E0 19660 bytes
SHA-256: a3f428f386d02edc3d0170fa924ea59ed7280c55c40da791edd8a9d9d2a59a35
font_01_sfnt_off00010432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10432 11236 bytes
SHA-256: 316812a91049a41eba32dab4bd6f679ed98d446a329a0f08fcc8b05590d31779
font_02_sfnt_off00011e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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