Malicious PDF — malware analysis report

Static analysis result for SHA-256 12475411514fd863…

MALICIOUS

PDF

89.7 KB Created: 2021-08-07 21:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c1040d5905a44b4abef38c8b0678ae69 SHA-1: 1cc7c56c2e99729f96ab2c8aa0b62a144e826195 SHA-256: 12475411514fd8639baecb300f1b31a7c90d893c477b48b410ff0a2aeb2159aa
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites and potentially disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • 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://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/cf99a6d77168cf07f2023e956f8222eb/49780233525.pdf In PDF document text
    • http://kleinschaden.expert/userfiles/file/kebinodifiworekome.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/33650846162.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160de66664d0a6---40646216439.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/319670154181c01064d66afd7b1e67a8/25261340526.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/23721899037.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/ut73rt32s7jr1vdv36og5f2bv3/8675363859.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90c595ae4---37285546669.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/66152688932.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606d35c7343be---wenuwuguzutelasojimi.pdfIn PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/genitobesatabo.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/nimege.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/gojawa.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/84629717030.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/9213239270.pdfIn PDF document text
    • http://aven.su/userfiles/file/51923934612.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ebe0950a1---maletepujetapaxekina.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fff598012---20536488556.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021062503235217.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ca8b6d189d9fc5c5827191599913b93b/selufezuludirakebe.pdfIn PDF document text
    • https://blogsma.com/files/80420490934.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/d0b016794ad872a9c1d6a9498f82e999/borala.pdfIn PDF document text
    • http://wghsclassof69reunion.com/clients/b/b3/b33699c65747f61a54cd06c2fab73d22/File/tifaxuwavatixowazuvozoxo.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/63866684354.pdfIn PDF document text
    • http://rideco.hu/upload/file/pirewanolodat.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98807959410.pdfIn PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/53338938965.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=guided+meditation+music+for+sleep+youtubePDF 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_off0000f928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF928 11176 bytes
SHA-256: cc773de3ef07995f10e998f93f368221eee3171c85614b8b07476b16e0ed6f32
font_01_sfnt_off00011319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11319 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2B 16732 bytes
SHA-256: ec68da99743c6f6197e2bbecd5d30322ce17b1385dc304b76817c7f3d0b60ed3