Malicious PDF — malware analysis report

Static analysis result for SHA-256 f50cc9fa712d8906…

MALICIOUS

PDF

73.4 KB Created: 2021-09-02 05:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d57d16ae069427cbe49d9114f266b6d7 SHA-1: 08d2e05adf18201846e8cdf4f32e0709ada92612 SHA-256: f50cc9fa712d89068676f44438c11acae750711f45fda25e7d444329461721e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=worms+zone+unlimited+coins PDF link annotation
    • http://teplospectr.ru/images/files/36905104149.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/esdfc8qjp3vq1esr8q5qir4qjg/46871545952.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/89452546170.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/78479885901.pdfIn PDF document text
    • http://www.heksan.com.pl/file/14589822048.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/ruwixuviropakanubaz.pdfIn PDF document text
    • http://giaexploring.it/userfiles/files/mexevodi.pdfIn PDF document text
    • http://keramann.ru/uploads/files/zokeran.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/vedu6ncvoao4f31rab9i8coh2b/56387219233.pdfIn PDF document text
    • https://sambelteri.com/contents//files/jutuzakenogove.pdfIn PDF document text
    • http://falerisztika.hu/tmp/47657214835.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16076e54f556a7---62438436478.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089bc7bd40b9---xunupapidajinan.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/94530236200.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/nmpleb7rjifpsg6b68nq90p2l4/61306265906.pdfIn PDF document text
    • http://irishvaughans.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/19552908866.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/f56f19d23e59049e0f2f5463a7d5368c/padujejaz.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae3ad7e7ff---xegidubesinok.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7351ad350---panadifenexogov.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/ae4656f78a050e6fe8ed017472e0fea5/jowegibasivisevuk.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/lotamuvamejeg.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16071957f491cc---munan.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160871b25f32f5---2239942200.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71855082ee---laralozizi.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_off0000bde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FB 10524 bytes
SHA-256: 1ff0af2aa7dce9a60b58fc6ceca2bd600ea42fc1da19a89344dea5e029049f13
font_02_sfnt_off0000edfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 16148 bytes
SHA-256: 9e374e8d92fe322df76bff5e701ffb235947c9b8cb6745dce689df6de1045f7e

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