Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7d7f7492ddc4f6…

MALICIOUS

PDF

73.3 KB Created: 2021-09-04 11:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fa63aa8a5e1c3f4f72202ae6a6ec4b1e SHA-1: 82c13b7177eabdbf1b850fcc38dbfe0fde31fcfe SHA-256: 2d7d7f7492ddc4f6f5387fe92e0fb89e6ff3039df365679facce7ee81ad20276
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, likely intended to host malicious content or redirect users to phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The document body is unreadable, but the presence of external URIs and link farms suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/e6d22223402814a0d613da46cd0db66d/rikakile.pdf In PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b01563d369e---25494724449.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/78e7ea405d01d53c96eb182cab215ba5/32446315942.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/77d4717a3fa9a39c0e36e2878709a061/64772440599.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/beviraralutal.pdfIn PDF document text
    • http://vigova.com/Images_upload/files/ralixovaxatujebisosixa.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/45978975082.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/22595275473.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/50080622137.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af93855cc91---buserizum.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b2773493fb---neridafapuvive.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/kiwivisovalubemone.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/bi8g72d6e5kir0ad9qdc6shrl5/27051280785.pdfIn PDF document text
    • http://lakes77.com/clients/47041/File/natugukeviwokodi.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/rifurunoxegu.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b5669b097---30796050855.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/68600451284.pdfIn PDF document text
    • http://pioneerbuzz.net/userimages/bevipijemib.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808440c94e4---81271937264.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160df3d5d38187---28593713025.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0d9a11bee---53159114760.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/admbg1ubvdv1it7tg23eahp3iv/wizirodivej.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/47685669429.pdfIn PDF document text
    • https://curryleafharleysvillepa.com/hang/userfiles/files/zapedigojax.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/90176936006.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=proposal+sample+pdf+free+downloadPDF 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_off0000bac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC9 17932 bytes
SHA-256: fec571f160c1f1e29db508abf448beb0a6a5843179f8162ff41ac41eef2db152
font_01_sfnt_off0000e6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DF 10556 bytes
SHA-256: e87c68e132592d3dcfd17faa8515f4a0baf370a7529559b1f0ea9b1c1351a98c
font_02_sfnt_off0000fef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1