Malicious PDF — malware analysis report

Static analysis result for SHA-256 254f745aa1401121…

MALICIOUS

PDF

92.6 KB Created: 2021-06-28 17:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 705933fdfe3b4bf1d57b9d76e4e090bd SHA-1: 046c767b16bff5f655bcac39210a560d0e00ee5b SHA-256: 254f745aa1401121b16655a1fa4a6450681cd176f12c34a35ebf755ce9aba7f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs, many pointing to compromised WordPress sites, suggesting it's designed as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://crewmak.ru/uplcv?utm_term=quotes+about+players+in+relationships PDF link annotation
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a987d8a2e2d---tejonajazi.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/tinupegixowuzovajabik.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///dijuzulosagewomalow.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/ca8343990a255708a6a59e919bf21b5e/12797328646.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f4c48d0a3---23653967114.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/mavivofatoma.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a451c421a88---fitidom.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607952e898b38---xetewoniruzemomuxoro.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/pamonupa.pdfIn PDF document text
    • https://computerzone.pk/file/dopazezozebugusokexal.pdfIn PDF document text
    • http://childhood-matters.com/clients/49507/File/wumuzi.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/somunugatilo.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2420a30d91---76006267560.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac347d696d1---14467908683.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/vijupibuwekid.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608630453b728---rexulewogugafevajexipaso.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/96332359285.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608700be5a896---4702222377.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/d58438745f53ab9f1329f40e8a866eb7/mosalume.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16074276ba68ea---tigitasudurivanukeg.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc7f121636---81197612433.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e48a1ba7a---61906620578.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_off00010636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10636 17744 bytes
SHA-256: e2f98c4d410d6fddf77b83b9bd4b092bd69071837ab3d728df83b6e9fe3bf5f0
font_01_sfnt_off00013461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13461 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C78 10760 bytes
SHA-256: ca44b978c3cdd6e06d8f7bc210e600c84d34164d1bf914fb511ed3c0f00e0f69

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