Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c582b55436de2e…

MALICIOUS

PDF

126.4 KB Created: 2021-06-29 01:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fa40a4c5d4a265458f8a75bb7a75e2de SHA-1: 7a65c8169ecbc5ac6f3a667a618df7ef9d4fc226 SHA-256: f2c582b55436de2e8fefab67cac3fba22b6655eac5d0fabc214222e7bc521a96
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories. The document body is unreadable, but the presence of many external links suggests a redirection or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc7a026e96---govewulomopulub.pdf In PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e48ea264d---40382672762.pdfIn PDF document text
    • https://menu2uplus.com/images/file/60172308344.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d0bf6865e---saxukifuguko.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90c7e5c584---susodafefuxi.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/34730519913.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/c793e4aa6fc4c30e97f50019697e590d/kitavobumuniwovugoxeweg.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a811c3c66df---14660064845.pdfIn PDF document text
    • http://msiutilities.biz/documents/neruvame.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1624636040.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094268e52508---51645226463.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/46494715375.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/b1f769db168dafbcabd604a548023ede/19582697707.pdfIn PDF document text
    • http://3sdent.com/upload/files/56495054868.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/epjlvooru6g1rcqib16a0kan57/29674636301.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/kizuxunu.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/f4d22d4256ced8761d582624ebcc44db/94794921522.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091a57317124---24572161537.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cd746cd70---41330229217.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/542d934be037d0baf0491c9726b5ee42/wapibalegore.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/5b09eba1a51573d5fb011331c7a8a640/92821908392.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078dc28ea09c---51965442075.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=southern+fire+griffonsPDF 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_off00016c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C10 18400 bytes
SHA-256: ee3ff8feb584b3da90f50f57536b0f0ec1f0e03c22c6699bcffead23ed20262b
font_01_sfnt_off000188e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188E5 20088 bytes
SHA-256: d9bfb9970ec1963a41da2cdf3fb9d5216eb6c2760eeb1fca2ad74cecf765d4b8
font_02_sfnt_off0001bc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC81 10460 bytes
SHA-256: 52a19fe1b3e792ae72cf9a26c02233a7247403cf1c61cabc632aacc2582c502e
font_03_sfnt_off0001d438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D438 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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