Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2249f958ca1753a…

MALICIOUS

PDF

79.1 KB Created: 2021-08-08 22:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8a2cfc56ed1a1ec9daeba134f5284944 SHA-1: e8ef217a3ff7e819947487b30c16003de2129b71 SHA-256: a2249f958ca1753a5b980c9711ae60dedcc6890df2173bda2ee073cc43d235b8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The presence of these links and the overall structure strongly suggest an attempt to direct users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cructi.ru/uplcv?utm_term=soniye+hiriye+mp3+download+ringtone PDF link annotation
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0029f064d---15715005911.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160799189318b3---47275727048.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/799e84fcdc978a3cc64e7c3ba00a5c4c/fepejajalipefisikepanab.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/17aaa90878b125e7782c325ed59f1a45/fiforejuwuvaxer.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160c4d05e8ba23---nesogevotudize.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b78c1ee21ee---gasijelomexeku.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/38055363405.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/6a1fefaa862e0e590b54d711ea39a00a/fufewinoxifo.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb5e10626a---laxulewogiwelewawukovi.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/87599515393.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210618_211115.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/46314335334.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/72864395960.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/wiwuvata.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160afd2178e195---watupowunogubazo.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/nuladixupunivanilitetofo.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/356241145.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/fogesudigigaxolesazukixup.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7efe59a34f---87411345183.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/kisutivapema.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/a3809a4d77757967ccad5882fa9a1853/penadilokafafudogat.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/zogatixerotimowomeva.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608789cdee322---xufuwumino.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd4f4a022d---43943170433.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb3ad0c6dab---fimulagidadituvupazalok.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zegixiwivagutup.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_off0000cc46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC46 18960 bytes
SHA-256: bd2efd403284ea39b640514a27e2b22f708204026896f9204e6f36c2475f8d81
font_01_sfnt_off0000fc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC13 11116 bytes
SHA-256: b6c79b34ad90407a240137bd18b766b1e417d01939c0d185b8bcd5ed98bd53ae
font_02_sfnt_off000115b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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