Malicious PDF — malware analysis report

Static analysis result for SHA-256 2494b2db61cfba77…

MALICIOUS

PDF

124.4 KB Created: 2021-06-25 12:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a03a4a12c243be0bbe942443c98c5944 SHA-1: feb25f090969582edcfc67de347902798aec78b4 SHA-256: 2494b2db61cfba77bb002cf98055d1bfb978887c6ed18a224747d35929000c6b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL findings point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb00f831094---sukamiwawujarun.pdf In PDF document text
    • https://topupdana.com/contents//files/24997410552.pdfIn PDF document text
    • https://capecoralliving.com/media/file/54255330049.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/getafajomuxej.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082525130a1a---dowapesupib.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/92183686530.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bff36133d8d---nutidubabe.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/n7cgkl5kbcondimqur1sp87f45/78732943940.pdfIn PDF document text
    • http://promador.pl/userfiles/file/batovo.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afb41aab33f---mugekeriluvotewesogub.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/b2budi46k9ppnu3o23gdl8jl0a/zirapokus.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/43773281157.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091cad12dd10---2836873568.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/2021562323225742.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa663d1c2d---77539014522.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b8e8cdaed---50193940749.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609308a47d9f4---81543223006.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/wafipoxalipov.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/4680494162.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=lateral+view+of+the+brain+worksheet+answersPDF 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_off0001855d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1855D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00019d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D6F 17612 bytes
SHA-256: 77bbe91a0b2ea6c2a73c7561a98f996cca21b12c5c4427804477b53b425341d4
font_02_sfnt_off0001cbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBBA 10652 bytes
SHA-256: 1e36d45d62b026b1e8790165c3e94ea25de25890a1b5f4f73f2486e1bd98c902