Malicious PDF — malware analysis report

Static analysis result for SHA-256 01497c1d8add7046…

MALICIOUS

PDF

77.4 KB Created: 2021-09-18 14:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 36c86fbf0ac28b03724841f6194f5615 SHA-1: 2df6174c4ba186ccf0850ada8715e814cd63f95c SHA-256: 01497c1d8add704627a597c2c0b56990cacabdbf9bb089feab73c65ee4c46753
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious content. The heuristic firings for 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'SE_PASSWORD_ARCHIVE_LURE' suggest a phishing or scam tactic where users are directed to download password-protected archives. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161458f40b8374---detilodusodagawax.pdf In PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614013ce50dcb---3004100601.pdfIn PDF document text
    • https://littleitalypizzany.com/nbloom/fckuploads/file/vidozula.pdfIn PDF document text
    • http://dealershop.es/camarasegovia/userfiles/file/kudoduf.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/17143611467.pdfIn PDF document text
    • http://qcfloor.com/userfiles/file/14720548673.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/pideminarofafununona.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/fesewereged.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/95130595380.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/41047426241.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/xubufuwidaziw.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/99875851300.pdfIn PDF document text
    • http://kme-kme.cz/files/file/zisuxa.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/38516632782.pdfIn PDF document text
    • https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/xogenadiradukub.pdfIn PDF document text
    • http://lblussana.it/images/file/28322086395.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/54277496575.pdfIn PDF document text
    • https://atlantidegattico.it/file/93980499818.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/susadinenajarafu.pdfIn PDF document text
    • http://www.pilatesyoga.hr/files/files/37979372170.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/rigaxurosogutot.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/39373827508.pdfIn PDF document text
    • http://aid-calais.com/userfiles/file/36652789558.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/36538827912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=aplicativos+de+conselhos+para+androidPDF 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_off0000c88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88E 10656 bytes
SHA-256: 098273cc8c83c1a04bc3d9cd8066b8c73de3a2faadca8cdc727551ac441e65c9
font_01_sfnt_off0000e0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90F 19068 bytes
SHA-256: d4f6f4dc32d3af025a23feb21240d5f0e98ae8f84a5da062842a0646f355ce50

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