Malicious PDF — malware analysis report

Static analysis result for SHA-256 90179a7325156dd4…

MALICIOUS

PDF

78.7 KB Created: 2021-09-01 03:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: de21555ace2b1453abf9b21b501ca7fe SHA-1: 4d68509269bde635a996ef64d2ba844139143c8e SHA-256: 90179a7325156dd406cf2cf84b93f9b672f40261a2aef10fc080ca14e5b9757b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing attempt, with a high ML score and ClamAV detection confirming its malicious nature. The document contains numerous links pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The primary attack pattern involves luring users through these links, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://coretry.ru/uplcv?utm_term=play+one+block+skyblock PDF link annotation
    • http://farashimirooz.com/files/54586934299.pdfIn PDF document text
    • http://berbun.com/user_img/file/wafuxizexa.pdfIn PDF document text
    • https://www.albriug.com/static/editor/ckeditor/ckfinder/upfile/files/8082558305.pdfIn PDF document text
    • http://safetypath.net/cms_images/bidusofomowewuxalunuw.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114c103043bd---kazozidixonisugotoxe.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/zigagokikag.pdfIn PDF document text
    • http://benetalent.com/upload/files/44688735365.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/d1493e3c5e5e1b5307273a5bcc7ed472/disuvebofike.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ac9a47e9d---damevuzagixa.pdfIn PDF document text
    • http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/nakiworej.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b2ebbb0c6---71288592578.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/rakoxudesaxomalilufe.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/1fe9da2213d4470659c60ce4802928cd/52356739942.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/14688312050.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/modujeriraru.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb24721c86a---19020219039.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/13670820045.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/23498259017.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a49d86822e---weguxuvukobo.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/69305263013.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/18005727330.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/31380177468.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/uf772kgnv4ao1sp4r710j9rbi2/pufutijuvowijunidefivod.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/50822774988.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/4928507346.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_off0000cc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE423 18580 bytes
SHA-256: 98ffb3ccfb62d808a0b314682f33f4bea6ad7222e0f9f139988752fb732007ba
font_02_sfnt_off000113f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F2 10280 bytes
SHA-256: 9b472e4334d9a91b3b0c94a3bed43056e53e9b9056f524cc0f37ce20c363b46b

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