Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1332a61b8555cd3…

MALICIOUS

PDF

83.3 KB Created: 2021-06-29 06:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 179ffa5136085ef01c5f35618e965006 SHA-1: b654def3c7c8c5c5f01bc7e5ab06b5894f184a3f SHA-256: a1332a61b8555cd3aa8e8f6b1feb6497e9b192fe8e0d9bf2adaeb62425a4224f
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The document body is heavily obfuscated and unreadable, providing no direct user-facing content but reinforcing the suspicious nature of the embedded links.

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://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/vsrm2pi2t5nretm26hm92cr1m7/pudolobuted.pdf In PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba0aadf913---kifizajizubuwenez.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f42d8759b---80394577418.pdfIn PDF document text
    • http://centurionim.com/userfile/batiment/file/gunesomonewuros.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/64917540510.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607603bca8ca8---87262596147.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/c0h495b6pfofkpne6vktpq8u7n/litam.pdfIn PDF document text
    • http://songiadahoaian.com/upload/ck/files/rebonumeburoxaki.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a59fea0ab25---85507780430.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4b0ab160865562e7873cf0056446ffc1/wuwuvazikalalaralejigol.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/b6d1132157a45ab3ab9981b59355d264/78544166075.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160befe3f370af---13923479161.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c621cb9cf6d---fizokeropemileroladatel.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/gepit.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/65dacb79349c3236c1f5cfbc58e5d886/17147833646.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/897aa9c30d08ce5af2a8e95e9a25b6c3/sulenedegenu.pdfIn PDF document text
    • http://cepsagibyachtfuels.com/images/photos/rawafuput.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a460f89c07f193ada5bfa8f8e9893ca2/xozuwofapep.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/jekusaj.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/mutulatojedojelogij.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160749a1d538d7---18489438419.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/61593871908.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/45425072081.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3a9360a04---nufubivusuvorukomusitugu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=jam+2020+physics+solutionsPDF 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_off0000e074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE074 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88B 10856 bytes
SHA-256: b7249ac52ba454b31ac272dd77d6ff341255349c4354cf1b97acc53f521c5a00
font_02_sfnt_off00011187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11187 17128 bytes
SHA-256: ba65e4fd86f40d839eb2deab3b45f0d745ba19f60e4e5d46baab3874bbe65312