Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c70d4c41ab1528…

MALICIOUS

PDF

86.6 KB Created: 2021-06-26 11:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 08903216298177e88bd6a30e0f001bb5 SHA-1: c524fe81a2537e727dba6674893f9df6ec28ed39 SHA-256: 80c70d4c41ab15282f62224a79c635b3fc4ed24d997b24a40d9fa70f420f0acf
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document's structure suggests it's designed to lure users into clicking these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://awlights.com/wp-content/plugins/super-forms/uploads/php/files/b1e48877c48139299a46a31e6498cc23/zorurubitudeje.pdf In PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/shoa4ie31mcqrksoslk6blo6u1/lekov.pdfIn PDF document text
    • http://scro.ru/pic/file/fibatonir.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c71f7e3fb2---22439316560.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/fuzetifata.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/64782527638.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a8b9e9d78---39029645398.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/33596f7971e448a697ce9df04dc8d9bf/lujafivefevixu.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/kavilukuz.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa3702294b---guzinujoluk.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/97701969299.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/60823947921.pdfIn PDF document text
    • http://cjmjwarrickhudsonfamilyreunion.com/clients/9/9b/9be434dcd9982d5451de1b36a82eb828/File/16174160087.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075c042c4dc6---guzikagazawezabodosev.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/8ab7c0b9e2ca49b2e92aff0d0740c553/xexowuj.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/b27b6d4c74b5c2ee1584a4fe6526523a/zogaxexefupokodu.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/64882258464.pdfIn PDF document text
    • http://alkanboya.com/files/file///nokutomosuvog.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86940d2947---piwezubates.pdfIn PDF document text
    • https://mytopics.it/uploads/file/nilatowogiwifixeguxivuka.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/42548721058.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609de8db320fd---77883818899.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/8tc2it6kqvug73ugmu1rlfe2d6/82870681966.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/rjail8up92qc326fu69qg72rb8/zilom.pdfIn PDF document text
    • https://tavio.ru/files/file/31145643014.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/podoxejilomite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=list+of+connective+tissue+diseasesPDF link annotation
    • 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_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 17056 bytes
SHA-256: 1a7fb9484235c98538c553f77aff05a38f0289370e4598adaa85ec179b9d0e17
font_01_sfnt_off00011d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13526 10444 bytes
SHA-256: 5bdcd652ba227c5735a9d3a209d556159c39463677d8f2baaead0d6f65fca790