Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf566da5ac0da96…

MALICIOUS

PDF

85.7 KB Created: 2021-07-13 15:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a6c32ca068ccab984264f0f7118dd95b SHA-1: 5c52021c44aea03a0210d70c590a3341f43fd238 SHA-256: 8bf566da5ac0da96c933081a93ec5393ecf4e3bb9d362e588d7f08d5e5d213f6
204 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The heuristics indicate it functions as a link farm, potentially leading users to download malicious files disguised as legitimate content, possibly related to game downloads given the URL parameters. The presence of a 'password-protected archive' lure suggests an attempt to bypass security controls by encrypting the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/a8020ba13715eea3c3d7525b5d597639/82114374432.pdf In PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608104418f1ec---68998089479.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/97645365063.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/31142649854.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b72c6dbb8---debib.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210608_3EC29E91A7B51825.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/91165231082.pdfIn PDF document text
    • http://katachizu.com/img/news/files/61613796268.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac83285f9---sufinasuja.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///ledebakek.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/rpepike1cs46nf006tkera2sq2/wajavakirudalizasoli.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/78d3f9756387ad3452bcefe26c8d457a/68829249583.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/f1a77224aa56bc6722a27de16f14dd08/45555263665.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/bukubinafodupo.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/80b7da01142db1dc9514cc5f546e27b6/maxuvevifurisitinirexe.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090af081bd0e---53281371181.pdfIn PDF document text
    • http://world-spa-resorts.com/dok/75376215481.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/ponik.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/av0nv4bq7d7ckp3uolp3h7apgm/8555061348.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/36731949841.pdfIn PDF document text
    • https://piuspvc.it/userfiles/file/5690186262.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210708_9CF61CE0CD971BDB.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/1382cb3b6a5fa9372398d7ffc3758e87/wuvafapimoludowidomasu.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data//files/bojidik.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/876d4a999004408ed6c70c0ed24756d6/43759973202.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/8029ac4d337567ebd8af02c0a34e15eb/49959841168.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=spider+man+miles+morales+pc+download+freePDF 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_off0000e9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C4 18484 bytes
SHA-256: 624805e30802cc2f390163f030094e070f69452563fcee1caec54e0dd6925e86
font_02_sfnt_off0001302b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302B 10844 bytes
SHA-256: 961110085926eaf949bfdec439414fa2ce025741025c13e8ab0bcb53247d360c

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