Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9804aa13d7292c…

MALICIOUS

PDF

81.0 KB Created: 2021-09-05 15:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 33c0dad9a001a13add06c71f215a569e SHA-1: 3c456063f17cde333370c74629bff3e5ab8a94f3 SHA-256: dd9804aa13d7292c75324d69b9af4ac6bb8f730fe0ac093120ec090554cc0abe
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that form a link farm, directing users to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery via these links. No scripts were extracted, and the document body was unreadable, but the heuristic firings clearly point to a link-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://pistant.ru/uplcv?utm_term=how+to+change+google+docs+to+pdf PDF link annotation
    • https://bosgo.mn/uploads/files/86407831214.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608486eac853d---36457290515.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/71573496774.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec1ea30e5b---dugadixe.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/27385534894.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/28848293763.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/68843768438.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/u2et8p9tsgk7rh6diccdrbhf7b/9372081428.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/vavuwepim.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/bedadi.pdfIn PDF document text
    • http://temple.mo/userfiles/file/28865661725.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9eab394de---46484013798.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af44c6e75a0---71412453870.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/73692889108.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/27056986084.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/risifej.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/b4654d886ed94bb863cf13376922372b/maxezirosibapa.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/jupegojorelodoxagi.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/86760735949.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/jubipusirujesi.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/314930403.pdfIn PDF document text
    • http://hosteleriayvending.com//ckfinder/userfiles/files/mepiroruxefirojavoni.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/gebedajogozubaleraxota.pdfIn PDF document text
    • 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_off0000d85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85B 10784 bytes
SHA-256: 6d4bed04fd82b699991d3971f980c04a84503814569797f9c0ba5915ffcf1baa
font_01_sfnt_off0000f0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001090e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090E 17352 bytes
SHA-256: a5754c5af0c1af39c66e7013aedee13f51a149f35f1d1b23aa9391cfc461e108

Open this report in the interactive analyzer, or submit your own file for analysis.