Malicious PDF — malware analysis report

Static analysis result for SHA-256 47356306781041c7…

MALICIOUS

PDF

78.6 KB Created: 2021-06-27 00:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 408c4fb0d9f75c36e4f6930bd52e1538 SHA-1: 56a54e176ef37c78806328e08bb712055a02504c SHA-256: 47356306781041c784037595037394135e90d984b716d9c3c21515a17cd0e0e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised websites and disposable domains, a common tactic for distributing phishing lures or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure as a link farm suggests it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://buka.ru/sadm_files/zumaki.pdf In PDF document text
    • http://tamker.hu/userfiles/file/41227455598.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a76b4fd9539---nulaxifebu.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/f6939ade45735d89f1c42b47473d319a/59708555903.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/8dffe18ee8f6c080651f7c5fc351d680/12843885093.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/1bbe90c320274840f139f54d4b6a7e25/nurokavonaxapuvisoluku.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/14861207968.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/bb454632b949b5da24f323f9d744820e/14992292960.pdfIn PDF document text
    • http://www.radiooro.com.mx/media/images/uploads/files/82452090025.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab2e9a95e8---22551166302.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/6c34cs1sm5brccaeolksdvug2c/78454157205.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f25c7d6a7---zesijezixowawugokemuj.pdfIn PDF document text
    • https://argumentua.com/i/file/7531975206.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/62543231344.pdfIn PDF document text
    • https://aashianarealty.com/file/xonogutamomaxuropemojir.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16077a1428e816---54315797672.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbc7a99e10---tanewoje.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609573b4dc0cb---43065417990.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/63d81b4db17b9a51d32bf55aa5f2a45d/joxin.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/21099782845.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/gajadutigubomiwekifewig.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/zexopikatejimodimiluzisen.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160723d4d73d24---kevololarijivopugugedi.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/4d59ac1e1f302214a50a97ce200102cc/boruwunezuner.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+open+pdf+in+ibooksPDF 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_off0000cf75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF75 17384 bytes
SHA-256: 471b8119e1edef068e80d3932151475ba21ff287f47c4eb55312f24b5c232b69
font_01_sfnt_off0000fd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001156a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156A 10492 bytes
SHA-256: 0e021f1f51efffa36e66230a9a1dab2b9cd9d82d6a9f7ea94bfc9b5f3c3c38dd