Malicious PDF — malware analysis report

Static analysis result for SHA-256 0746da69c9e64dfd…

MALICIOUS

PDF

86.4 KB Created: 2021-09-07 23:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3bd60512daceef4cf34e081f28131fa7 SHA-1: 5a2e3c2c99fd09f439f0a9563bff3a59d9bd5d5b SHA-256: 0746da69c9e64dfd49d703110c27706b935ee6f422c23c2f4f1f0e60425e99a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress upload directories and disposable hosting. These links likely serve as lures to phishing sites or further malware downloads.

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://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a74fa0bf870---40509031357.pdf In PDF document text
    • http://carlaschroyen.com/content_docs/lurenaruzoxuvawawesebozek.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/darutokewobolojot.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/tufilogobozovupogitegovev.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/dixikexoro.pdfIn PDF document text
    • https://securityguardsupply.com/php/uploads/file/fakorajefe.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed9b70d235---80560555667.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/4ia227u55gj3n5re1n6h5fnhem/nazodipuxaka.pdfIn PDF document text
    • https://eternalbliss.net/file/baliriji.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/94053373406.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/kuburiresakenimijupuzomi.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/86002657543.pdfIn PDF document text
    • https://bozoklar.org/ckfinder/userfiles/files/xuteb.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/fifisivu.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1eca256625---42526514650.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/83916774297.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/55617c2b5b0867468888dca8e98a88ef/ginelavenela.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/bomazugemikiv.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/ruzoresavewaligetatagatu.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///45004481316.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/50787784334.pdfIn PDF document text
    • http://eltprof.ru/userfiles/file/25650489996.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/buzawulafukasubiduj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=calculo+del+dominio+y+rango+de+una+funcion+pdfPDF 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_off0000e56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD84 10944 bytes
SHA-256: 652cd14de3d5573a9740acab144809d85ef77e8084ab6d5e5ef8ac4230e8caea
font_02_sfnt_off0001169f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169F 20208 bytes
SHA-256: 2b3b294cead0a2ee4f7dd431c5be17928df6075b5f45ad2c605e0d9b8a7d3b60

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