Malicious PDF — malware analysis report

Static analysis result for SHA-256 3abd397627554190…

MALICIOUS

PDF

105.0 KB Created: 2021-08-02 11:36:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: dfc531d5fefc6da1e9d1b6d8d5a3435e SHA-1: 2e6451e87ac6e5986600bbe59f56ed1f4daa6e19 SHA-256: 3abd3976275541905b547f274e871028256772738061be5386fdd88b82672b6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and embedded URLs point towards it being used as a lure to redirect users to potentially harmful content hosted on compromised CMS platforms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://border-inn.com/CKEdit/upload/files/99182452082.pdf In PDF document text
    • http://veribase.com/E/file/97591968184.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/261ba248f61c3f3acbcfdcb7b7eec52c/sumerokafobamisifepete.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/32dee949d037a216338ecb3af20b256f/16556227105.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107ac0f3e150---51264966457.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/28d1cdd8a45b0e295c997e386f6a9f26/fedawi.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/1aeac31c39a77424078677f67527d56f/66293739393.pdfIn PDF document text
    • https://medtek.vn/storage/file/4149858073.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/g984h1h1r9fhdppr665jd38ubs/62260876651.pdfIn PDF document text
    • http://pitafest.com/clients/1/13/1337b7689af00ddd847345d48bd720ff/File/15505972637.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///fajomok.pdfIn PDF document text
    • http://boxethai38.com/upload/file/85041009203.pdfIn PDF document text
    • http://hitechdentalhouston.com/uploads/files/fawetolovetuketunozuwo.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083e3f927dc3---munit.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/xesudafonixositu.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/0075d7759e7baf292ea6d95269a09772/fosemib.pdfIn PDF document text
    • http://talleresjpg.es/img/file/30024987491.pdfIn PDF document text
    • https://123natura.com/stockages/files/3083218913.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aed59383c6b---donuganekagizi.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/mufanuri.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/zelemofedawenu.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/fb1fc7967a46759c301f49ff8c3f7f25/30754372252.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e31abf59688---legos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=palabras+que+nos+indican+orden+temporalPDF 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_off00013053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13053 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001486a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1486A 11060 bytes
SHA-256: a1080f92480f8087f3dda59d217d4a3c3befcfd742f13dbe83d3374272701af4
font_02_sfnt_off000161b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161B4 19772 bytes
SHA-256: 59548f469c1a853273f85c7df6be73b69da6fd5e6eaed0767a4719053eb37e1b

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