Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45eec780b6567d6…

MALICIOUS

PDF

69.3 KB Created: 2021-09-24 18:37:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 1147d6cf58080498c9b2dd264b3d6a8a SHA-1: fb815696d9d345d12df57c629ea7d3706b5b947c SHA-256: f45eec780b6567d6706ace2f1ef758a59493ffe9c870441b4c4dcdb7f043128a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains numerous external URLs, many of which are part of link farms hosted on potentially disposable domains or compromised WordPress sites. These URLs likely lead to phishing pages or further malware downloads, indicating a malicious intent to redirect users to untrusted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=sms+organizer+rcs PDF link annotation
    • https://oddluzanie.net/userfiles/file/55076821292.pdfIn PDF document text
    • http://gibisch.info/files/files/44150316913.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/12407473904.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9bf7722a6---furevowevanozowixijapebe.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/fc19f3e25493e776fe18c5043412c965/67046947259.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/14897060945.pdfIn PDF document text
    • https://vjlabor.pitscovn.com/uploads/Upload/files/napatufukesumufifojusiwut.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/1416838502.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/xatagirenavokenowoboxufom.pdfIn PDF document text
    • https://geloracinta.com/contents/files/644607492.pdfIn PDF document text
    • http://kystar.net/filespath/files/20210914173159.pdfIn PDF document text
    • https://xn--49st2et51duvk.com/upload/files/wesine.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/85191684795.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/77357662820.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/mozinelabenokaduvaf.pdfIn PDF document text
    • https://ateliersmq.com/pevron/www/img/file/84385554412.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/roxisa.pdfIn PDF document text
    • http://aquitaine.annuaire-regional.com/ckfinder/userfiles/files/tadebupogukosojodovemus.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/17797611815.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/87919612144.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d927b8086---54185707756.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000acd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACD4 16388 bytes
SHA-256: 1facb80f0408e26e792199b665d0704fc76105136425554cb73cffe54feb6abc
font_01_sfnt_off0000d6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A4 10564 bytes
SHA-256: b16198a08d14700f6f34cb05a0b5afd7a5a5004d2d731115685c8964a4cfdb94
font_02_sfnt_off0000eeb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1