Malicious PDF — malware analysis report

Static analysis result for SHA-256 f291b7d801bfbc88…

MALICIOUS

PDF

62.5 KB Created: 2021-05-20 02:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: d9ff925dcd8ae31adc2370f0e71527e6 SHA-1: 166f973c8fc0bd5d34d477e36b5f3f09a1dfc6bc SHA-256: f291b7d801bfbc886cd9b8dfd295634e70d243613621d8fa699e82d32fb02a8b
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs are likely used to redirect the user to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8574

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3b4f7db24---koxigivikat.pdf In PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/3ec68d653cb4252719c1e2fce729956b/38797151925.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/mtv3hqdtv3kk41irh4fn61hni2/wopereluloruxumiwani.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/840fd2961a31a368359769e1795826f0/35304799614.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857ea80fb82---lodeguwevibume.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/2irh7ucurov9dbsgneu5mkviq1/fujesakigaguwi.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/477b321950afa997694ba1d6233c1942/tuxuzegezenepoja.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bc2067750---58451517963.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b536c68990---fuvid.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81471b800---41272093053.pdfPDF link annotation
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/2lc19nqs896819g13gnhbk7m31/27791755171.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc381a24cd---2980221774.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/43f2557b2ba490488e4bd105464587cf/gorujedeviximu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1830603fc---zonukinusuzegaki.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a059bd26882---luvumujisofokesoporot.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/pm810uur2e2bq8i8j8epr0gdhc/58581205886.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/aa6ffd6a8f021d22c870a12407fec4cd/34987995003.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=carpenters+block+mod+1.+10.+2021PDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76A 5684 bytes
SHA-256: 308261077c33f3d1538bfec8e0fd0312e4b24c5fc0197fc304a9e80cbe75ba8a

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