Malicious PDF — malware analysis report

Static analysis result for SHA-256 00aff93b6abd0ca9…

MALICIOUS

PDF

87.7 KB Created: 2021-06-27 23:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 668dfd1f3ce9706fbcfb5c8a9bc5be5e SHA-1: 1eaf33200a9d9b4dc8d763b744c3f14c4d7a1d5d SHA-256: 00aff93b6abd0ca96f98e30b63c316222e65bd9b15e5c91236fa907802314f70
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 embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URIs are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://krisoc.ru/uplcv?utm_term=use+assimilate+in+a+sentence PDF link annotation
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/53deca328ad8c38b58fe905f3848a981/51001424889.pdfIn PDF document text
    • http://spoilersmensgolfclub.com/clients/865201/File/92074941910.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e81bf42c76---gixizufejusefupe.pdfIn PDF document text
    • http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/wizijadiwewotejezuto.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/597567858f42108a2ff7b2fd6ddd3c1c/21100149393.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/dedobabakuf.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/47537780344.pdfIn PDF document text
    • http://abpaluso.com/upload/file/geguwasilobawizura.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/901bf17632e74c9c0d3c68afe86175b3/2052235714.pdfIn PDF document text
    • https://badrivishal.com/media/97544415624.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609040ced73ed---56689133113.pdfIn PDF document text
    • http://huiking.cn/uploads/file/240649084022.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/62qr8gvotpq6mi7j94qvptt0m9/32967093066.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987b3197612---pemofinekibutixalamu.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/47585aa5a01cb3e724e13f32f9dc027d/16119576494.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/kajer.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/070cc60909a0506d84e0455e3259e2da/tolariwigomexi.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736a53b3202---nexubatadezeveke.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/fuwupumumudivivuna.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/36806807587.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16073eaf4af591---56116724633.pdfIn PDF document text
    • http://armanetti.com/images/regolakuvesatujixaxuno.pdfIn PDF document text
    • 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_off0000f636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF636 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E48 17144 bytes
SHA-256: d58dce5bd597dc0bfa0402c35d5827b5469d60236a7acc0c8ebe62b0dfc6ad1d
font_02_sfnt_off00013af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF7 10180 bytes
SHA-256: 525b4bb1f0c7fff173ae4a10376675678745ef76450897b41d6f6145e21951a0

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