Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc0d3e7a5db6585…

MALICIOUS

PDF

81.4 KB Created: 2021-08-31 20:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 935536380b52f55019413d96b95d23bb SHA-1: a38808ba5675b754e842a344689298c84383a2d3 SHA-256: 8fc0d3e7a5db65857337476dfacc3df1797b08ac5fefdc11db55e33b29bfcd27
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised WordPress upload directories, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081d639b8dbf---70503764348.pdf In PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/5545c8da3abfb6c8bd9b55c354b56f48/17167871740.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/92637277800.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608879fb31c1c---97527478713.pdfIn PDF document text
    • http://baobiachau.com/luutru/files/37387661836.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a87f0b83ff0---xawet.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/f3ied2cass08uki368bjp701g3/migufebanefifiseko.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/telufegok.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/xofomotagol.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/fugatonirojajumoda.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/68178871685.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/7c849036976645d7845bee56d12cca9e/dodiwelojevoriwilo.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f3235a3e3f9---nudebubedimafofuk.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/gaweg.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca36d9b33f---megetew.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e64847d7c80b8664fa7bbd9e36977479/javewuxokakukujuf.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/morok.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/46920621611.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/foluwogatuvamipagiweb.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/ninapolimuzivow.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bcefef061be633782f2c64ddf5244833/27857869716.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/80728825725.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/b4f6c364f39e400f04ddba70c4efda58/juvorolu.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/pokojoxawawajijoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=rolling+for+stats+dnd+5ePDF 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_off0000dc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF451 16704 bytes
SHA-256: 905ec2c3197424fca853b5230f9feaa0fc840c40562ca21f4204d2bab8e4f450
font_02_sfnt_off00011fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB9 10708 bytes
SHA-256: 83cdcbea1b0d2a3c45f728cafb7dfb54e18f5cdaf3ed7769f8ba516ada653834