Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2a1f6e7653d369…

MALICIOUS

PDF

91.6 KB Created: 2021-07-30 12:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d7713c0bf33ca8f2d3c56efaefe09895 SHA-1: ee8d531814a9c5330cc9a096c6bac193fc51d18a SHA-256: fa2a1f6e7653d3697affa3ef668dfaac5bd1242758b70aa01f4b31b18a8c09bc
156 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, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://akapacha.com/userfiles/file/tigofiku.pdf In PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/forusitezudosideza.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb38046699e---weluzogafodenufudawola.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9270ea7ed---91969963981.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d51c902bd---78908864877.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210720090824_suajxg.pdfIn PDF document text
    • https://polytex.de/sites/default/files/rogifekabizuriko.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/dc6015646776a6cd8b4dbae479152db6/bopanapix.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/b89c97bec2ef9d79cd350bcd03b7c6ba/zegegudajenetajuvakugu.pdfIn PDF document text
    • https://susta.vn/userfiles/file/51423830783.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704f0198644---labaziweve.pdfIn PDF document text
    • https://nic-n-nate.com/files/files/kixedo.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/3d56fa4849b83d6c2e7333e1f7df6431/ninasizilunojizedalameb.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/zulanif.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d4c34685c---22066919049.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/34efd05842a7140c7de2513b020e60ae/sekoz.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/86554028247.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d6e9f38af---27529102175.pdfIn PDF document text
    • http://primehorseproperty.com/userfiles/files/56734520470.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/3e0b9752fd380933e2ffd37ec19aeeec/79745743153.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/5140469248d14ae95dc4fb43cd05d2fd/witikes.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/nalilider.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5f6f5e7c9---mobetono.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab5901f5d6---87537589421.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=texas+hold%27em+rules+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3E 16448 bytes
SHA-256: 3769889bac2ab0d35afefa3e7b76da7c8a86b8c0668ee488eabd27a71e5946e8
font_01_sfnt_off000101d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D1 10668 bytes
SHA-256: 061ec17ffedefaff8186d7527ea9308d2f48f2093b40e91cd62eec7114f48539
font_02_sfnt_off00011a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13264 17480 bytes
SHA-256: cdf024719791bb12aab4ff52e506904dcafe52082bf0b5c0dbf5f1a7354c533d