Malicious PDF — malware analysis report

Static analysis result for SHA-256 22227a3640a1ecae…

MALICIOUS

PDF

90.7 KB Created: 2021-06-28 06:34:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 74349e814efbfae6f950d664d747cb29 SHA-1: 6e8cce6bacd71710490632d9145778a676bf34ad SHA-256: 22227a3640a1ecaef84da55dc77ba395725e0daaef0b0cd265dac728fe7bb5fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://irlanc.ru/uplcv?utm_term=most+impactful+words PDF link annotation
    • http://camionespanamericana.com/userfiles/file/samisurijukoxuwuxagado.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/08b18105bd69231012b0eee41cd83526/94299719302.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da9512063e---jonibagetuwezasituni.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/18c50e04819b2c03f83f664df7fd00a0/pebuxiwudi.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/muxutovajupetawu.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c201079a8---ganowijux.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/19a9b723dd827f89599fc246b724efc9/zexovuwu.pdfIn PDF document text
    • http://bakoca.hu/files/file/52798673994.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/a0om7bjf9chbu05cglvr6s3ogu/roxudawamakudaxenobo.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/xifuwavokowasediga.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021060918271573499.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/zoniwigup.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/igv1k5dfviktif4u0slv0fu39h/73958098252.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/bjceo2gijlsinlnt4h70portk7/39404806091.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/18ad28a5a113439b00091061eb07dcd0/movofir.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b08c81e744b---dokutuzaboparuso.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711b784b028---2530309946.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/tegawezolepatazatirefaraw.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/55cfcd1a99e89b16ee715f55d04184dd/benesadez.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/33644758048.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/62336024823.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/gujugedajamajipusafeli.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/b8b5fc466711c3b2682d08ab97323d3a/95199362257.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609644648a433---28265579021.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_off0000fe96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE96 10724 bytes
SHA-256: 75572b7fb9319c8a0a964935e811e3f050a040232f9dd906453655d179b6ae90
font_01_sfnt_off00011752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11752 17628 bytes
SHA-256: 78bdec72d122942425bd69d27ecc92a2b4e8eca1ce4877fac3e2318edc3e70b3
font_02_sfnt_off0001459f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1459F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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