Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf4358ff1affcb5…

MALICIOUS

PDF

86.1 KB Created: 2021-08-15 17:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0bd1e636bb5c50004b6bb72691d1679c SHA-1: cc0fecc6acd1d3e8d3d7acad65299524b4b76831 SHA-256: baf4358ff1affcb5c9e61736ad0bc221e551cdb1c9b95fd4f4e24a86bda40ff5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://wastran.ru/uplcv?utm_term=how+long+do+i+have+to+file+an+aflac+wellness+claim PDF link annotation
    • http://orsolyajuhasz.com/ckfinder/userfiles/files/wavuwazodoxuvixexopo.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/disevup.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/17571391030.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/bawelotubikab.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/wivegatipeb.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/573b77eba3c8ada230599cc57c033c8d/52284427371.pdfIn PDF document text
    • http://nissanotogovap.vn/uploads/images/files/45847844032.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b393a137a8---lizibuted.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/d3164a0c71008712798f4397fef6a8ef/32820220034.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/e0328eb22f4accf20497db353a95ac2a/65506926813.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/numonuxugabag.pdfIn PDF document text
    • http://dgjst.com/upfile/file/vinetupujebogesosigejami.pdfIn PDF document text
    • http://www.americaninvest.net/upls/files/mujulilololozedefaxu.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9d1e22e28---50935211250.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e8a85630d---pedodusof.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/duxamefofob.pdfIn PDF document text
    • http://vickerycarpet.com/uploads/images//files/706898047.pdfIn PDF document text
    • http://myarrahnu.com/mo_images/files/45629932665.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/dudugatubif.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd198c6efe---kugepivukobolugilep.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853b8a0c68d---debibapirex.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/jatuzazebezakojunabowo.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777a804349a---90588632969.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160782bb9477e3---tevujizopetop.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/rutopiviramulexuxeba.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_off0000e9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D7 17000 bytes
SHA-256: 524682a9f1f3c36fca015824cc3f773d3155be891e722cfa7cc8953ba74171be
font_01_sfnt_off000115e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFD 10964 bytes
SHA-256: 18512222457b0c56b7e28d0d5e0cb3421228defc3e591ffc2ba756a11fed882d

Open this report in the interactive analyzer, or submit your own file for analysis.