Malicious PDF — malware analysis report

Static analysis result for SHA-256 59113919428ffbae…

MALICIOUS

PDF

73.2 KB Created: 2021-07-02 10:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 32fc21478a8843a8380eb4f9be285781 SHA-1: 8088152c6c742a44c25ef99870790b1e86f3a492 SHA-256: 59113919428ffbae180bad35ee0d60df48d9b86e0bd4254ddd1f862fe325c7e6
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d0842111a9f---datesuzup.pdf In PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/jgc7ukhf94u9bgd5n4vbsmtmp8/vivuleb.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867092e3940---81897717336.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/d4fde75f9422f7d3bf403dba18931faf/57690246852.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/tajasugibiten.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d673a4e1659---korudutaj.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cea947ababb3f1ae1063e91fbbbeb70d/72695948561.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071747de456a---fixof.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/9c1999fe9e3169d96acd3616c8bf3e42/18015312828.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/lubabesenupimakufupovu.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/5500b2c202a12c5829dbcaf9629fbe68/jojujakutigaf.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/behq7b2lgngehnkg5kesu1jh47/jorujirekiv.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/kazusumove.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/lefivumolafatogagi.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/35818253548.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/4b5b897895b1ef5f812d6c299a3b8946/87920279589.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/85c8b910854b3489097c46a2a671a7ca/jimeditiboketijegejoguweb.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/vaxovakowab.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/tugavoporimaxokivarasomo.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/8b050f95d4588c92c5461b765912a555/71930884850.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/wamavodokatorezidapebo.pdfIn PDF document text
    • https://schmitz.cz/res/file/lepafat.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/14/file/20210514_082239_178.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/s4h56mvba0ab3iefkl5tvmjo6i/80973885903.pdfIn PDF document text
    • http://salinahighschool1968.com/clients/3/33/33fcb9b832a528c934b1ac42c6b88a99/File/gavamarisepejapozirotesez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=frank+towers+cuckoldPDF 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_off0000ba6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA6F 10528 bytes
SHA-256: e71ce5cff77480d4110c0c6a581f5ba375c491b575c47f8a605968ebf20e0d20
font_01_sfnt_off0000d29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29D 17556 bytes
SHA-256: e4d317dcf291e019df587e763c753990235df9d6e25de0c9e01f982f0ed4f33b
font_02_sfnt_off0000ff4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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