Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c7db5fa13cb510…

MALICIOUS

PDF

87.8 KB Created: 2021-06-27 00:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6359b53a45cb5584ca4a2ab7c551caa2 SHA-1: 63a90eed2dd18a688c1dd00e3b8942ace84facc0 SHA-256: 78c7db5fa13cb5106905dbbea7df177fbb1ea020f8e0c6595905c0061e53fded
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to compromised WordPress upload storage and other potentially malicious sites. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

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.d-table.com/wp-content/plugins/super-forms/uploads/php/files/1368d78fcab0bfeb1748b3c23138066d/piguzemupag.pdf In PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/91183641005.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831338aaac2---57127055129.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/fabakurovokaderekakil.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2a2bbb88d---95453919854.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/3c2ee06e8af2d1e8c9a2269514a643b5/63709454165.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/a1e7664f23e225b1119a24b2eafab75b/dusol.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fc1572205---45088710616.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ce94562330f---lubitirapuwireremo.pdfIn PDF document text
    • http://gfhs1978reunion.com/clients/56625/File/nilamononomedejivutu.pdfIn PDF document text
    • http://kadernictvo-svetlana.sk/editor_uploads/system/files/gibarematunatikut.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/66546661466.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/ci6rrc5u5ueb8p9h83loov6135/jijafupanifevotevilot.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/pivat.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/00c7b92d9c40f06c83f06639a589e090/mevalofuzezulaze.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a32a4c765---kilera.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/pijofifuvifaguraze.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae909ec148a---fidudaxinomakitu.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160b713306e02e---favelujukimoximedova.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e52f0a21bd---disevafuxoja.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/ad63301edcec8adf05c526c1917cfc6e/77012960147.pdfIn PDF document text
    • https://ancoraeducacion.com/images/bowanube.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/25852503827.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/k1obhv8mefhcli5ig5pktitq4h/3616127420.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=race+and+culturePDF 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_off0000f63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63F 10128 bytes
SHA-256: 5f8e56f2f1aab6ff68f293673f42db9754f07e605e089e5b9970c4ab714e31c9
font_01_sfnt_off00010cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFD 16812 bytes
SHA-256: 056e7d3769a7cc6b066e3157d721c7062869e0ce1dd2eb721c52e3e67af0cc66
font_02_sfnt_off000138bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1