Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60d69012b82f547…

MALICIOUS

PDF

80.1 KB Created: 2021-09-01 04:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 13ddcd31c53bb9cc61c9293a98a37129 SHA-1: ebeb8eb91e17dbcdf6571146d649eea99d35bde3 SHA-256: c60d69012b82f547c3c54cc151bf98ea3e5cfba3f0e6c83051e119a921ab4736
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely intended to lure users to phishing pages or download further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://catamma.ru/uplcv?utm_term=hard+math+problems+with+answers+for+grade+12 PDF link annotation
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd63cba22fd---lurazelibiwuvob.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/sotujuw.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/70733691346.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/363a181ca5cc5916d31eea75de84f186/20016582849.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/sipulegexujejarozu.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/fipofiw.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e665504fb2---pafobajutejiw.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ae9d3df93---garurutana.pdfIn PDF document text
    • http://xn--l3chcucnqd9c0eua7b1k.com/user_img/files/futigilemoxipuzarikajepug.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/xizunajonekijap.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bec0bf327f8---49755150486.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/89489026725.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbc29c8890b---37480917952.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/gij17sclmibb1e0p0fnnodjv1q/83925340847.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/xafefosivuxa.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3f0947fb4---vemurifomuposasitufej.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/99e9a1dacfa8dfa9bef64b28334b2f34/14446705757.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/37914961552.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/25h6hf45hurta5vmm4urns6o17/tererofe.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086620897a85---97997589455.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/b79097bd6063738e4db384f85dc943d4/tevijafat.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210620_154226.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/40601062242.pdfIn PDF document text
    • https://aashianarealty.com/file/pataxim.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/32132437380.pdfIn PDF document text
    • http://rokakisreunion.com/clients/a/a8/a85ca1e4cfc2bb88d767af442173b437/File/8200627790.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_off0000d2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF1 17200 bytes
SHA-256: 04eb31f5c80107b204921f3c42d875e16d849d6647a959aed40bfa780c5c98a7
font_02_sfnt_off000117ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AB 11336 bytes
SHA-256: 53c4f1631f72a13fcb7d82330f2b2f9680eda28926334debf26a8056ecf9a6a8

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