Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d8d7892709f959…

MALICIOUS

PDF

134.3 KB Created: 2021-07-03 05:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0c5b9fe63fc3b6283212929889176f52 SHA-1: 66f1d95792546046db7cb377ece2a981e2a0b281 SHA-256: 01d8d7892709f959091301cca4774f737ddd17d5e9f01ca659446d1ad7dfcbf1
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://cructi.ru/uplcv?utm_term=wordy+word+game+answers
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/2b73ae99b15f615aa1f2154dd033af82/31329316045.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/d93142fd4de4077a03a2e19b1f6002eb/66098963594.pdf
    • https://tecnibat.net/uploads/archivos/69132451297.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16070f5ebdbafe---tiwixepepi.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc18e78778f---57417358212.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071bae7d24dc---86786517681.pdf
    • http://belst.by/upload/file/54103067129.pdf
    • https://anthonygillant.com/userfiles/file/tesepexelulovebisuseneni.pdf
    • http://coffee33.ru/archive/file/katinuluwujuveruzibixed.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075fa1639a45---16528435249.pdf
    • http://quickvideo.nl/userfiles/file/zavojitopuzipomax.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0d2bea003---29764012885.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160790d24428af---867534697.pdf
    • http://ithaca1961.com/clients/875375/File/mudisalajugimuziwowegogo.pdf
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/a480ca142b2d210205dcbe34d1e1f6e1/54291079589.pdf
    • https://sonarmusic.hu/up_image/file/xolelawiruparakiganipe.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4ff2759dd---58162533231.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/2b645ed1ffa48ddf2371dcc1009d3f41/53121985011.pdf
    • http://qca.ch/userfiles/file/bugezunepamegasu.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecec8b8699---mupefapaluruvapidareje.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b760a3dada4---jofusufuguw.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/ae00o9fubtkmq4fb5itm23gkql/nodiseg.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ae38.bin
ad0037aa5d305cfe00cde9a8e0792987df2721e475a7f2e9d47945b9a2938bcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE38 10548 bytes
font_01_sfnt_off0001c619.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C619 16792 bytes
font_02_sfnt_off0001de2b.bin
b6ac5fa5ac7d756e4da544a4d0f390e5ae0d70a442d5bb7fd85f873df0a79bc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE2B 17956 bytes