Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e4ee40447b1ee1a…

MALICIOUS

PDF

74.6 KB Created: 2021-08-12 15:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a51ace00992532c8af8a3d5c99aa5da7 SHA-1: ea9a74f2a2e4c243c4240b0f27d604f4e75295b9 SHA-256: 4e4ee40447b1ee1ae2445b6adeaa4e451117d0f9d47af0949e1fb8f633112173
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs that point to compromised CMS uploads and disposable hosting, functioning as a link farm. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://bualuang101.com/backoffice/upload/files/betimokipezoxunemekufi.pdf In PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3ec6b31b923ce50d94ac833a16976a32/74322007291.pdfIn PDF document text
    • https://activepymes.com/pub/file/54915477569.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///87208097677.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/67817823024.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/62c9135d7a9a1c335a7f9f7932eaa8c3/womonesexejojuw.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/moforodefukuze.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/3ab5c2eb50df5c630bdfdf1471ad8d0a/fimojalinemunixasaz.pdfIn PDF document text
    • http://maihome.hu/admin1/file/xafaxalufutaxobiw.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/rilopavawarup.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/39hs1gamss45qh6tss5unrb4q1/gugige.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/81590420479.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/e0muqou6bul03ocg3usu4j80n1/98194256679.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/kulib.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607496a25f95d---kumofizaf.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/25092855902.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607485a41b575---falipirudif.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/22bfbfd7f994c58b522cba0de63fa95d/kivafivune.pdfIn PDF document text
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/kenejak.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/54027184576.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20215262253274329.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609074822f7b4---rinojamuleninugaxolev.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/vexufedor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=madden+mobile+20+coin+hackPDF 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_off0000bf2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2B 16712 bytes
SHA-256: 66edfe7b6ef2b304882316a547b39f03d6aa4d0f19483edc132877b0096dd70c
font_01_sfnt_off0000ea80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10297 10736 bytes
SHA-256: c7240c479893876f155493402204f0eabf371bf16e3248d19d785c6e5670209f

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