Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9636fa2e8c8567…

MALICIOUS

PDF

97.6 KB Created: 2021-07-30 05:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0cf69df07cc564eea6cfd950215d29a7 SHA-1: 29aa2cd91b9d1a0e1fa0be6392070f2aee1cc09c SHA-256: ed9636fa2e8c8567b448d92b82f3f2fc5ebe708a06e21329d5c627425653b80e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised WordPress sites or disposable hosting. The embedded URLs and the PDF structure suggest an attempt to redirect users to external, untrusted resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://bipaf.org/2009_home/upload/editor/file/xijexefepovebapibilirufut.pdf In PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/ditefijoxujixe.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082638eac19c---28779481534.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f14ac3fed---jiturojegeturaxebufalawi.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/sutiladapugim.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c33955a689b---39894858360.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16097b864de0b5---15148997690.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc83ab0a880---97244890970.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608317319b2a6---nurafu.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/98478500712.pdfIn PDF document text
    • http://parfumland.sk/upl/jaxolawepux.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16074149d5606f---94808500754.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/d3b3fe94c5c1798908f6bace56f577fa/25890097117.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/38622551210.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/c2cffc690449aae0eb75b74ca1361a21/38034415802.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/08gccdckqi4nhtuaj57e4p5g44/nevovezekaloxijixuwolog.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba8cbc5256---38416878656.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/65353052421.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/622obh9m5g8drtstb3j7b777tv/tuwakelifijikumorukex.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/gakum.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/9d59508130a4915d63e2d7b5a3351761/19503328869.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/46522249353.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/xibibofido.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+reset+armitron+sports+watchPDF 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_off00011979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11979 17860 bytes
SHA-256: c6d7d9a42dae959cc38e1c1be6e075c3c025480c8944818065e3ef6af1d21607
font_01_sfnt_off00014877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14877 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001608e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1608E 10672 bytes
SHA-256: 81bf4b4b24695fc4e222d6585e55183d73ca9eed705aa2b1c047c55905c8e9d1

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