Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07a4e53428b20a2…

MALICIOUS

PDF

79.5 KB Created: 2021-09-08 07:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8f8aaf9cd3cdd3624946eb6d5e002c9c SHA-1: a0293347a4bb43fe242742a6116b670525fc7d90 SHA-256: c07a4e53428b20a2eca4d91acc66ed741c3aec6bef4f3696a61060e5dd2804f1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous external links and the 'SE_DOWNLOAD_BUTTON' heuristic suggest the document is designed to trick the user into clicking a link to download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=nteu+cbp+contract+2017+pdf PDF link annotation
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/9o7b1jlm9dif4qom6eidmv7bh3/lapotumamifuwokalude.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/4bd61a6e36ea91367c1323a9fb04f1d6/zebivemumivibo.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/35bb65bd675cf7307b9e24a532b1051f/8137030716.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/e7g8dev8p755jgd5hhourfpbn1/gufefuravol.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210703130151.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee7bf3e0f3---nirejojiwulebaxuso.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e70037606---wujakesorubuzexif.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/83843574286.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1608af66651007---lulesokamujirilefez.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/fidixatavawisuk.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137564e3995e---lojovinedixiko.pdfIn PDF document text
    • https://kcss.hu/korosi/userfiles/file/wokonixulelafazoj.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/52975032234.pdfIn PDF document text
    • https://pasarantogeldua.com/contents//files/jopebi.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/fgsgrer91qove5qs1aq072kjko/93926724716.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/fologewewinigiwuw.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/tepuredapudisedoviza.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/8nc2jnkbqs8p9ntv1qqfhgn9ms/24113245429.pdfIn PDF document text
    • http://schmetterlingsgaerten.de/file/4094066672.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609145350f3f1---78503583632.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/59b5231a62efae425626219a751750fd/33028527891.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/fvr8508gkoifu9dtt3m9fk7305/lewolubodiredaniti.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_off0000d0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E5 10868 bytes
SHA-256: 5048fa2d275f6cfea7ad5b7b8fbd5a13cc3cac619063efe9491ddba4265327c5
font_02_sfnt_off00010208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10208 17904 bytes
SHA-256: 5e4ae70df5643b30aef0bbc7be0e5c668b659b5b22b3ef1e8f6a466a8d15b82e

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