Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0e4ac0ace1fb84…

MALICIOUS

PDF

87.9 KB Created: 2021-09-01 06:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 131fd875a84dd5d3379ec8340a178e26 SHA-1: 13b37ad433193416d8d22a29e6b506d1323c3583 SHA-256: ce0e4ac0ace1fb84e3b3212e0ea84c8ff17fd34411640a559e849e73f65ed136
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The presence of external URIs and link farm characteristics suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://allytemp.ru/uplcv?utm_term=falcon+and+winter+soldier+online PDF link annotation
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a6c15862f---25337583180.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cc97b538718---33376557497.pdfIn PDF document text
    • http://irollee.com/userfiles/file/85443518095.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160871d27c5766---tabipemotenisene.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/jitisokidaroko.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1bfcbfbf2---relomuzaberesozejunibo.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/a4v2utjjpcqvnnh5jc13cra0ev/99651720526.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c211e7eaf---10599326234.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/403e275b28bd433a8cad8258f80ffab8/lizesuxasitixa.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070dc77b9b21---89435156106.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/br9n5pit27ktngtv70n949k32t/98232954685.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607635ef11622---jininirav.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/65038921911.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/4018999706.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/45879823458.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/renadegiwaxasobowotel.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/65066290822.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af3daed8e9---67090679057.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/cn4fft6nobotqgg5dsajg5g1k2/47595392093.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/jagazoriko.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/7bf3f3acb4357079657b0730a46db6b2/zofonebowale.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021070220595373499.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/l5r80mdl1bmjnu7enj529mueuv/zomawagil.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_off0000f271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF271 10424 bytes
SHA-256: 9fa875ed17e5db8870a8d33dfdfa2c7bcbc6738ed74278e8dd55a088ea524bbd
font_01_sfnt_off00010a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3E 18200 bytes
SHA-256: 56c6a1e9f9563a9b098c271a3ae8edd417143826f82f28a9e453c2c9e74c873c
font_02_sfnt_off000139b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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