Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbaeba260309dab…

MALICIOUS

PDF

107.6 KB Created: 2021-06-30 06:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aaa9b02e00b43985f27fff787fa5bf54 SHA-1: f1d8c032276cd44a6c665e9b31925e1417f55d2f SHA-256: ddbaeba260309dab34ea154194f122e29cd55de5f2b247e09f05613219fc981f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to potentially compromised websites and disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URLs point towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/mlkfkncjmicqmp45k5im8c5ut0/86867114122.pdf
    • http://studiofapas.it/userfiles/files/bebemagesuvegawinivefipor.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a802ffea855---tobajarakigoruwakazima.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086adcece7c9---disurevogadojux.pdf
    • https://defaico.com/d/files/3154138511.pdf
    • https://jambukuning.com/contents//files/32155180111.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2afb399230---74039813452.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607412babb6f8---zorejoboxasixe.pdf
    • http://animationcoach.com/userfiles/file/63123227754.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853407c4079---94405834443.pdf
    • http://jdhs77.com/clients/58520/File/54485272553.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77d5b31e2e---tupixiwonakukafulajaji.pdf
    • http://kwartetproforma.com/userfiles/file/dixumodovugesajojotapajo.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/10153cb4795120cbbaa590c21d444cc2/nebudafoleji.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2c0252d6c---10496409785.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c7e561b0f---33420056586.pdf
    • http://saovietgroup.com/upload/FCK/file/nafexusuwu.pdf
    • http://tuanayapim.com/rsm/files/5175142263.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c355b4def94---54628388575.pdf
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/77663795802.pdf
    • https://muzeumkonstancina.pl/attachments/file/7245908585.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/72b6a8606f64974db24f5a875bf21315/89830352570.pdf
    • http://rzn-house.ru/upload/file/71371399924.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+long+is+one+yard+in+feet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000143b3.bin
6022426cf1dcc4649db7e5fac45f9ed70803877f9088570b509e5654bf91b0e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x143B3 10720 bytes
font_01_sfnt_off00015c43.bin
be1b48daf831e3243ad18679b8bde123f225c3cee01ff6288afc38cae1c5e40c
pdf-font-stream PDF embedded font (sfnt) at offset 0x15C43 17172 bytes
font_02_sfnt_off0001891e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1891E 16792 bytes