Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ab2fc4ec7f32bc…

MALICIOUS

PDF

82.9 KB Created: 2021-07-02 08:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5f5df9b0741dd476227a67d78150cf43 SHA-1: b183434fbfa7953e14c446d85eaba9025354cc18 SHA-256: 24ab2fc4ec7f32bc5876a4459379cfe0fb5cab302a332c38925e30743bc2b84b
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites hosting PDF files, suggesting a phishing or malware distribution scheme. The PDF itself contains obfuscated content, likely intended to obscure its true purpose from casual inspection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c657e5e8f---81485941419.pdf In PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/95f42ddec487900a83db8b7b4a25fe3b/rasikodakegad.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/73561348298.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/a454cccb5d58a8e33c5664c1a1f25b69/fower.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/vopusu.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/8093766135.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/8cf4ed1535cd631d1ffa6123b526fdc9/78498469440.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b2812975d---xepivarirodezamibufowibe.pdfIn PDF document text
    • http://biomisszio.hu/tmp/98819147890.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/85796936300.pdfIn PDF document text
    • http://bichvan.vn/upload/files/pojafasagi.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/2273723cacd9c994f7e94e3ac1e9e117/jaripazewusenunir.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/e3b1ecf8b79e801e4b119739f6d1f41e/82282699674.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a93a826a2b0---16919680663.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/io9rp7d5k5sd6r28mkkcci8rp0/21272839691.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/dinemabidazid.pdfIn PDF document text
    • https://bloomeng.com/uploads/supidovov.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/zevedirapob.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160816b3188256---70419845408.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/dd6de872c5bd696a611cdfa25e41f5b4/maguxexoduvoliboxogodad.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/b93d4379d5b94d2d996326973fddfd0f/52745388961.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d6aed3c8d---noxozevika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=pain+in+side+of+neckPDF 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_off0000e602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE602 15960 bytes
SHA-256: 243c90010bdf502b78df9d5de9ee5b35ff9b5c829759c9ac59acc9e15479fc59
font_01_sfnt_off00010f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001274a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274A 10316 bytes
SHA-256: e96d31b970eb08330933256162c0d00ce2d29a260f3050b369de5a32227c6f65

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