Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48fcc70da5aacb4…

MALICIOUS

PDF

88.8 KB Created: 2021-08-12 13:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e91a49262711f913ea540ff53fe877ad SHA-1: 13c4d4e5eb870f95986720ec5b7c6cbb2fe33afd SHA-256: d48fcc70da5aacb457580f4e2b4ed2721d76bf302f925dc5f0a163c8283443d7
196 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites hosting other PDF files. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests a common tactic of providing password instructions to bypass gateway scanning. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/ce19b7f3fe1019260f7a846fd18c769b/votetigunivevarupetigi.pdf In PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/a0a53c6d48d3e375c0c7bc677252523a/peboter.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/11586127004.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/71458687209.pdfIn PDF document text
    • https://ijp2.com/contents//files/46109508402.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/xajab.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/57a450ff4764edd52650a9c8ebb3c477/81162788126.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/55556240870.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210520073318.pdfIn PDF document text
    • http://furniture83.com/upload/files/lakagetafosoxezo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827bba93216---lakipugi.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/rabadojikopomodege.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/0db27b7806d893dbabea3f208178384d/57093334234.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae670a47e9---jokegasuta.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/60d86e7ac68b68cf8cd5acbbb7730512/takisu.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/76204257667.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/5aa2f2e837346d257a7601c4e7d659b1/wosujodibaxivoletas.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/bg819r0c0k5g34qfc6lm8o50e3/vazudevadeleraror.pdfIn PDF document text
    • https://brs.jo/userfiles/files/28646559269.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/siwarusenitulogatowi.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c513a2856ec---35024479485.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073eb005dad2---godegipegidufogik.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/ziviru.pdfIn PDF document text
    • http://rrarental.org/upload/file/woseluzixulopagozevojo.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f737b90fe1---jakusosiw.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/vutigefiba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=objects+first+with+java+6th+editionPDF 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_off0000f241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF241 17920 bytes
SHA-256: e5fa9ec6fa3f1a0fdab374dae1717aa6b1ff2e8fa1552f6341f53daa8f9eee07
font_01_sfnt_off00012148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12148 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001395f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1395F 11144 bytes
SHA-256: d3ba842ca639ef65e6528791e839b9ccd137a1bf3ab9d3988553b65da05b0758