Malicious PDF — malware analysis report

Static analysis result for SHA-256 994e49fee3d3e233…

MALICIOUS

PDF

89.5 KB Created: 2021-06-30 21:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c999117f8369cbfab8e3a6bd2513933e SHA-1: 4210cb7f99abaf35cdeb5af569a942a0a5ea44d9 SHA-256: 994e49fee3d3e2335bcb34f039b6185058070515fc226b9deaa8ed879461bb96
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to numerous URLs, many hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and the use of UTM parameters suggest an attempt to create a broad-reaching lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://leadershipcareer.kr/fckeditor/_upload/file/pewipugamuxu.pdf In PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082adea6f1db---navedolipinukoza.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/kosuxagexutegixiwo.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9087cd69b---60242848724.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/df0ffda0104c6dd7bd8470fe38b5870e/sefavovelesatone.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05c512083d---30325940729.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/ec481be2mquf6oeel3998rcddb/58214514787.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/pasokunovewodegifunedif.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/76a32abe19162d06d5be83d48925c4fe/zunupisibovif.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b6810a86970---48006808666.pdfIn PDF document text
    • http://iphysiology.ru/upload/zelizijenesot.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/a482e6337ff96f97a2ecaa3ca909982f/2578319168.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fd795169c---tewimawadiwit.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/98335811074.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a32e3c5518c---jesububanepevederulejulo.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/razajepif.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/vojutofotopabakar.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b02180b6560---17592626332.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/46439294902.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/6a0rh5q9v171hnhbpscruaicgr/debijug.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/tobom.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c682bb1bea---67039633285.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/9dca3aa89b653a038ec8b86df84dc195/vukarebuzerijepobedago.pdfIn PDF document text
    • http://sy-smile.com/upload/files/66427317227.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/79749759713.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=causes+of+molar+tooth+painPDF 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_off0000fca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA0 16744 bytes
SHA-256: 43649b3ac9737bf5ef144f4a9f3bfa1d1ffe35caf68f570ed0f2f7600a735754
font_01_sfnt_off0001280b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280B 10752 bytes
SHA-256: eb90fb57806cd388246ceb057146463bfd8cc3ef54aeb278fa4ebb7f6df0e679
font_02_sfnt_off00014098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14098 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1