Malicious PDF — malware analysis report

Static analysis result for SHA-256 5503c278efffeba7…

MALICIOUS

PDF

76.9 KB Created: 2022-04-14 12:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-04
MD5: 7c9748334500af2f979689c179b06e11 SHA-1: bf11329a864f8487bd435bd39fc6ba98e3968460 SHA-256: 5503c278efffeba75eeadffff6ee0c361f1585b955b0f44071c417bf20bd165b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, disguised as movie streaming lures. The document body text explicitly mentions 'Watch the adventures of huck finn 1993 online free', which is a common tactic to trick users into clicking malicious links. The presence of embedded URLs and the nature of the links suggest an attempt to redirect users to a malicious site for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://colod.co.za/YmrXLWy8?keyword=watch%20the%20adventures%20of%20huck%20finn%201993%20online%20free PDF link annotation
    • https://kalimati.in/userfiles/file/82873883208.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/jinizasefemumu.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/162020330b155e---70760435820.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/2715400401.pdfIn PDF document text
    • http://nakajima-ya.com/user_data/image/file/47033878885.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/silawevemejis.pdfIn PDF document text
    • http://judemusic.nl/fckdata/file/fotasaxevafiloperagof.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/334145123.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/53181210410.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/161fec92852411---rajufaketuwitazariw.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20220319194720.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/4d195fa1bfa2f66bfa836d8e090c28b4/pesokupubutok.pdfIn PDF document text
    • http://goplayer.net/fil/ckFiles/files/87041767369.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/lagotetexinojerapezitefig.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16230e029052ca---99469368857.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20220307190034_b5b6yl.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/luvikumuwexunepedasar.pdfIn PDF document text
    • https://o-dance.dacola.com/upload/files/foxale.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/gelapuniz.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/161fdb7acadc20---fevewavevavenaj.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/jilapiju.pdfIn PDF document text
    • https://shiksha24.com/userfiles/files/66916452445.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/26e9446df1434c9c0592b7a4a7ecc35d/fazizavudedawagezinoxu.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 extracted file (font_00_sfnt_off0000c4f6.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c4f6.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F6 17144 bytes
SHA-256: 671a5c205c217295c3fd29eed41c53f4401935ab7e0e0d72fb3431545ab9a8e5
font_01_sfnt_off0000f1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FA 11216 bytes
SHA-256: 05bc656c3300ace0556377acb206fe6b6b89665a8bdd6a06808d7247131ff5ab
font_02_sfnt_off00010c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1