Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c47c55db7285bd4…

MALICIOUS

PDF

79.1 KB Created: 2021-09-06 00:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: b06753beaa1fb99fc19068692541523a SHA-1: 967a44847406eb33b4f97159daab2d21c8acca63 SHA-256: 7c47c55db7285bd40b28c787d3d71011ead42e1d9a2b75be4177023e839e2acb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute traffic to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

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://weblative.com/wp-content/plugins/super-forms/uploads/php/files/rsbomut578rhlsucgu1jd0115k/benigamasewamibemobazulik.pdf In PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072ac7294f51---jelijekadofogat.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1624623877mijomivikiwi.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160d5a93bc3181---xorunelen.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/fufonujobi.pdfIn PDF document text
    • https://tonitomov.com/picture/file/xijopufitado.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/39233906561.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/5d869ca530be2f204e06587820d47938/68732020186.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/8ca78b5006a8580dbeba425c0f29c00d/74673341772.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b044ed707be---mufozimober.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/bufidajuxotefonut.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/97962853573.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607deddd3b7d1---votizafudakavukogesobiw.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/22192356596.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/brc8cv4cbv33s4jk5qoj4ha7dc/wogijifodidujuvaw.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/11324977706.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/161efe5b258c48805e22b49f5ec134cf/pamiwis.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210821_1BE3F9D32AD33AB0.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16127589c89592---37410831268.pdfIn PDF document text
    • http://paradigma.bg/uf/file/tugibek.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/62209053087.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/33344202083.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/nilnq0pagvtvvv671fpf7e3424/linofodiwubiburonotivezap.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92520fe41---gawufuroda.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b56cef66f2d---suwepom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=enciclopedia+de+fitoterapia+y+plantas+medicinales+pdfPDF 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_off0000cef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF5 10880 bytes
SHA-256: c47b2af3bc23a0a5898a086ad9201a95cb2c3eaeef437819f4c6e87d92b34916
font_01_sfnt_off0000e815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE815 18052 bytes
SHA-256: b95b3c6220653c265dbbe82006fc9b155c93716976c4d57a2672d5eb112dfee8
font_02_sfnt_off00011626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11626 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1