Malicious PDF — malware analysis report

Static analysis result for SHA-256 80375664982155cd…

MALICIOUS

PDF

78.5 KB Created: 2021-09-17 03:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 12f5f58c996d538cb113aef81e7edf67 SHA-1: 7e65b032da3d4fb881336a2c500c080ffaf4ec05 SHA-256: 80375664982155cd735556191dc6ac02c4945b647a529e99631782fa4d4b5fc3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://coretry.ru/uplcv?utm_term=iphone+12+mini+vs+samsung+galaxy+s20+fe PDF link annotation
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/uc3cvsf8k0utqr2f7msesapuv3/ponibemazitolo.pdfIn PDF document text
    • http://marymo.ru/uploads/files/27831905240.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614367ae19a0d---toraxipuwer.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/sixixix.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/60208721041.pdfIn PDF document text
    • http://onlinevay.com/upload/files/5261691517.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/rowulofixefipilejorib.pdfIn PDF document text
    • https://onecre.com/images/content/files/88027467148.pdfIn PDF document text
    • https://megatex.ua/images/uploads/file/74392773372.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210902135452.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/88731303890.pdfIn PDF document text
    • https://atrax.hr/files/tidoruwuxixupafamexafewu.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b17324a7a9---ninedabazova.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/56648470522.pdfIn PDF document text
    • http://naturalwonders.com/uploads/files/55543478552.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/detuzesomutulevile.pdfIn PDF document text
    • http://vibrator4you.cz/UserFiles/File/maxujetuxelodemapugi.pdfIn PDF document text
    • https://diamond-marketing.cz/soubory/63872090340.pdfIn PDF document text
    • http://coolscape.info/images/files/jijotosezonipanezozigu.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613983df4bc45---51228055794.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/78017594872.pdfIn PDF document text
    • http://www.scea.edu.mn/ckfinder/userfiles/files/jitemefupidelemudatut.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/miwupepob.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/peverabexikigadanud.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/29169104041.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/tixubegebam.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB9F 21356 bytes
SHA-256: c17660adf6a1ae2d1ae884a4dc4b4c7b79fbb984c121ab1fbd03dc96e4ee899a
font_01_sfnt_off0000f097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF097 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AE 11236 bytes
SHA-256: 85cca897f5c63bc7c64345bd76d8e859e234aedb5ffebc1f8315ef7414e88a15
font_03_sfnt_off000122e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E6 1868 bytes
SHA-256: b44e304f4199d162c520aa61e4565b27969aa952fa2ee1db3f4cf671ae1a9eb8

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