Malicious PDF — malware analysis report

Static analysis result for SHA-256 322f1480ed81ea94…

MALICIOUS

PDF

82.9 KB Created: 2021-08-28 17:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a864981396648d4e4db87a5a94ef78b8 SHA-1: fc4487a18b13122c3d04253b9d90ffa79d88121f SHA-256: 322f1480ed81ea941895345f4e9fe51593cd6686b2857a9a446c3b6daac09fd9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that form a link farm, pointing to compromised websites and disposable hosting. The presence of these links suggests an intent to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://catamma.ru/uplcv?utm_term=the+second+founding+eric+foner+pdf PDF link annotation
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/semuzifozev.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/52838581918.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7f0011f4c---34538061446.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/cledjmkjcvo4l9m1vi0fa573nk/toselixifomudagajinupo.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/cmsrkkd40vuaapr21076isb16i/befijijazarafuliposim.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/341258203.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/73102936155.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/lexika.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/pisizazalapen.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/2684804376.pdfIn PDF document text
    • http://scro.ru/pic/file/13605240438.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/pogitomotajidit.pdfIn PDF document text
    • http://bmhs71.com/clients/c/c9/c97ff408e01126d63256cf68004d6641/File/xifokaretogetovag.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210531024234_1270040347.pdfIn PDF document text
    • http://newshop.jp/archive/file/ravekajekomarufikeni.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/rgqmp1aor6qrs49l97gufcnvbi/gosowumonenojev.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/360cada2711941406b92540ede6c7bbc/somen.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/luvubedot.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/bawosona.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/sibofejivagerel.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/mitowemavalinamatoki.pdfIn PDF document text
    • http://konyaozgunmobilya.com/userfiles/file/87986838679.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/796768d024e08131508f5c8eabaa8cfc/kurugi.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/57533872248.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_off0000de35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE35 10656 bytes
SHA-256: 6e61fd8aa24c21e5e8d81e25903e17e8b35e1f4669ae77b4d7383a9742100956
font_01_sfnt_off0000f646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF646 18076 bytes
SHA-256: f028c0e960070ab5c90fbf2b3206572cc8e6c562d0c31700441eb44b2aa390d9
font_02_sfnt_off000125af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1