Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa47f07bd3cb8790…

MALICIOUS

PDF

82.5 KB Created: 2021-09-07 22:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4661c2eecd15ab93786006fa445f1cdc SHA-1: d5dde9be5f5cf17272467f079ae32e79084d5e6d SHA-256: aa47f07bd3cb87905afc788e1d61acf7ea67aa368a704af95648493cfa8fe4b0
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The PDF's structure and embedded links indicate an attempt to redirect users to potentially harmful content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cdb8e837bae---ruwafan.pdf In PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/a9981a81c4f6f60ee778702d8c52ac33/pekixaparoginotojuxe.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/6g84kkntcd8gbauqb6o90j2qi7/38225538054.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad2d721566---vojavirutiwakopuzijiduti.pdfIn PDF document text
    • http://lawngo.net/fckfiles/38273298396.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/47cb7aa8fb67edda91d24d2284a0286f/mazaveduwaxe.pdfIn PDF document text
    • http://ohdiabo.net/images/ckeditor/files/47481473955.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/5101645715.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/rerunamegoxomamudakutozun.pdfIn PDF document text
    • https://promise-land.com/upload/file/jurupado.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/64535721655.pdfIn PDF document text
    • http://www.pvvc.cz/files/sesekewinog.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/rotujokiridepefo.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/ea90f105c637a8a3f40d10bf8e2bd739/fekokatomujo.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/530f2a94ce8306b24f00716ff2a3eb7c/tetiguvujaxabisukiba.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ac781acc3---xigagawerilidenumilat.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f01e74df4---86988075093.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab947b6d7d8---74593832006.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136b7ce1a6b2---33515842551.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/fofilutaxox.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/pnh8cl7gs5nekqgbous3ckut8g/69378537660.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/7360dfb9cde529eba62d7af46e658301/nuzokivokebojoxixed.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/75186147454.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/72e69215db03a77cbb804e366fff9b2b/75560826286.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=ferroli+modena+27c+he+manualPDF 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_off0000dbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAA 18700 bytes
SHA-256: 24415e9688cae5d7eba47d4f3535ecff468427f7d3c33c1c896992fb77bcda97
font_01_sfnt_off00010c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C81 10616 bytes
SHA-256: aa00794e6af7bdf9442845b9470ffb8a424a01bb1f7c838173ad6e7fd3c323a9
font_02_sfnt_off00012494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12494 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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