Malicious PDF — malware analysis report

Static analysis result for SHA-256 db09bbfe5965c852…

MALICIOUS

PDF

107.7 KB Created: 2021-07-13 10:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 40195f0b34bc45bc8872123f74dc5fef SHA-1: b75eb48022efc40cc334480e23b233e9e584473b SHA-256: db09bbfe5965c8529d096f109c2fa453f41c1768182b290674523e0908c435a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Multiple heuristics identified it as a link farm, with several URLs pointing to compromised CMS upload storage and disposable hosting. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of numerous links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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 http://www.salpasafarit.fi/tiedostot/files/velusuvuni.pdf In PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/66584595289.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/43k757dn5tmmmg2du0scrig73i/29669670477.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/nusojega.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/podewopafekebipu.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/xuwila.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/63946164776.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/zetozijurozugawu.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16094cc0cca9bd---20422626191.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2f3276077---galironorubibiniwe.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/50275108129.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/10cb4d452a720b30f28ed228535b73a3/79663763811.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/967477b611392ba4bb54f816f137e693/9890948196.pdfIn PDF document text
    • https://p87.hu/files/2180295459.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/017eb69d3f374d18a3e512b6f3817711/37700817442.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7a4fa0884---mitukifizarimeti.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xolojetupivezarigivaj.pdfIn PDF document text
    • http://osikovo.eu/webroot/img/content/files/lubab.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceae335d28---7553762173.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/1onsbqr63an2d0jvkjui3u7b62/wawadisukiburozo.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210624_3B8BCFC2EC2B9632.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/9cdccac7b2283657583c43a783a44503/jogemitawido.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/tdq3m6doiak6p344n8s5tol1ba/72046610881.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/toxuwamamarefara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=finding+common+denominators+worksheets+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA1 11176 bytes
SHA-256: c8ff820f3a877cbfc99d431f3dd12d5dc0ad41aa034810de7e22045a432192f0
font_01_sfnt_off00014666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14666 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_02_sfnt_off00015bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000173bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173BD 16516 bytes
SHA-256: 52669496f5a6b089c7fcdb56bacc98b4ff3eb06d493e3b028e12fb49bd4b82ed