Malicious PDF — malware analysis report

Static analysis result for SHA-256 29acc2ee2ecc1cb1…

MALICIOUS

PDF

89.2 KB Created: 2021-08-18 22:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 677ee3954e90058525c484487333bffe SHA-1: 2e291e5bbda502fee1e3423af3b144fa626035aa SHA-256: 29acc2ee2ecc1cb162d619d85d563e0dd625fdfc29954d048121eee7bb376a69
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://krisoc.ru/uplcv?utm_term=roberto+mantilla+molina+concepto+de+derecho+mercantil PDF link annotation
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/85f9da3b9cf6b55f27cbd4c34366543a/fojaxugo.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/wibarirozixupumotiseb.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/zebadukuvevumebelatox.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/2fted02j24ju928fpjfefns8qu/16551091713.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/xiguxuzepodoli.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/xalafasin.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d11a0bff4---35338329079.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608528ad97420---xojodabixobipoxeko.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/lutawina.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/tufidakakumes.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/rebulebejivajumev.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/deresewala.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/jirisavepapogas.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9e9a43559---sewuf.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/1b0e59dbefe27d15e96c7e117db62fba/jopebajokugawuxoluwipifaj.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/wefegedemirobokozunemokud.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/rabunisanodisajumajewa.pdfIn PDF document text
    • http://brunagabriele.it/userfiles/files/52242193231.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/vec78p9tia5i45g1it4co2fp2n/duradesi.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607caac90a590---57361512296.pdfIn PDF document text
    • https://menu2uplus.com/images/file/484317434.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/kexuvufatevakajas.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611abdfb0ac5c---77844093251.pdfIn PDF document text
    • http://soyaksiesta3.com/userfiles/file/zuwubamanasonidixexep.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_off0000f067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 10796 bytes
SHA-256: af91e4d6087fd528c987315c9659c0a3d0289a5f82648fb2538f998f01ff689d
font_01_sfnt_off000108cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DD 20776 bytes
SHA-256: 7f06e4b557ba594bf7ac4e61ee913e0a61111c8aec2266a68205fff5391fa003