Malicious PDF — malware analysis report

Static analysis result for SHA-256 b698e2a0ac78771a…

MALICIOUS

PDF

91.6 KB Created: 2021-07-29 20:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: acab2d7ef0dbea11f681e2aa48f9ac85 SHA-1: 7e926a28b4c4b883fb7552bacfc8bded4e6b0315 SHA-256: b698e2a0ac78771a050639ee067bce5f672e9a84e69224835a072ab1fa7049da
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many pointing to compromised WordPress sites acting as a link farm. This suggests the document's primary purpose is to redirect users to malicious content, likely phishing pages or malware downloads, as indicated by the ClamAV detection and ML classifier. The embedded JavaScript likely facilitates this redirection or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://krisoc.ru/uplcv?utm_term=what+is+a+low+carb+low+fat+diet+plan PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a432fbe3fe8---23013348555.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/4bfbcd10b606b4385a291c50d254000c/wamofi.pdfIn PDF document text
    • http://voijin.com/userfiles/files/98334807944.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/127b9da7758030b533a4827767b7a3ca/gokajebalimaxanivuforu.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/95406720617.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/380550bf32e94e49e4deb90d8ebe61b6/76176373343.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741dd6e06ce---wujibudagebatogigadujeb.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210623025055155886sa06ep.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/e265de609a205b8422a8e222cab240b1/75646511516.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802a1a695c6---50189353822.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/tepek.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/70413072514.pdfIn PDF document text
    • http://orlickachata.cz/files/files/78607462456.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/856b0f963abf34ff128bf4bc1a191110/namatulib.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/rqhet23jipku6sfjevld8dd24l/junujisanazitamiwogijo.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/7988356478.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dd8b245ddf4---47312324552.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/ee59beedfbfb33a98bfb154afe9705de/90143977853.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/i2b5vi650fhrbhih30roh6b3i7/43820858114.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160762a0eaea5e---ruguguv.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/c83d63420f165fa0bd78d504731d854e/54566252491.pdfIn PDF document text
    • http://efrex.cz/files/file/25654903358.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/17078439577.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa4fb9a4647---kupepazenadokoxog.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/36775315878.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/9af072413c5252b769ae04af5d84aa8c/pewiwikuponumak.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10193 17220 bytes
SHA-256: 37c4e84ee80245f3467de7380a6d94e0e51f81689df2f09211aa5d9b0c4d3fc7
font_01_sfnt_off00012ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000146dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146DC 10936 bytes
SHA-256: d70265348a9c7927ebe1e359d2922aebf7d34d3af116e3cf9b6fa5161a1443f2

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