Malicious PDF — malware analysis report

Static analysis result for SHA-256 74587090734cf03a…

MALICIOUS

PDF

75.9 KB Created: 2021-09-06 20:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d8871ed26c2f29e2d96ecdcbab2d1cf9 SHA-1: dc176a5250cf8d6ed6bf459976708d606a86ecb8 SHA-256: 74587090734cf03a51d63c482493a4b269685d16e0037ed053707260e11c2ff6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs, many of which point to domains associated with compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://crewmak.ru/uplcv?utm_term=cours+automatisme+hydraulique+pdf PDF link annotation
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/93080370964.pdfIn PDF document text
    • https://bayihoki99.com/contents//files/nuzulubi.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c400a0066db---nejamazunot.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/gipikupezaj.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/aac553096e59bc7eb35db22af850d765/28543323519.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/54780784947.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/94159010819.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/50697537332.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/782b64e5fb08cae17d33b1a12304a728/vakemeg.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/20466387093.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cafcb15b64---zijeje.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qut5e104blhla0fvenfoim1ca0/zogezopawegixot.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/53055860597.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/p0jblqghdnoehk6bcba6rudip7/zokakupum.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b964047cd---5266889626.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/1802e5b96db440cb0591f245b3287a1a/gubajajesogufi.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/53443126252.pdfIn PDF document text
    • http://centrons.com/uploaded/file/88647652060f0929d4755a.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/5890451136.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098c2234051d---90182370699.pdfIn PDF document text
    • http://mlkscholarshipsmilwaukee.org/clients/f/f0/f021f13c5c598389be7e913a1ae626ff/File/gonemudilejilisu.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/93c8a5cf6298a9762435fba094e0747e/xasitadadinadubir.pdfIn PDF document text
    • http://rsst77.ru/upload/files/65250819161.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F4 11048 bytes
SHA-256: e50cac3779e4ffbbe8fb19017718ec1f57a51ea0fa9e08f048d24375f07de7e8
font_01_sfnt_off0000db88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39A 17612 bytes
SHA-256: c8fd50b52d2629b8e18ac0526815b38391ce8c27746142f5e309a904f20e3c77

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