Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdab54b06843537f…

MALICIOUS

PDF

95.3 KB Created: 2021-07-15 19:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 40b9d5d1969d8bc1cf92aa0adbac44cd SHA-1: ab9e3cea7a3c90165f69105aee8792292f1c3dff SHA-256: fdab54b06843537f51ffdb64090791c45920afe758765c6bdd3fa63769093637
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 URLs that point to compromised WordPress sites. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://medvor.ru/uplcv?utm_term=hematoma+after+facelift
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/kd6jdfagt72ruooanmo3ilme9s/49515861784.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/n136e7jj03saaut9at4dm7seo5/13862492836.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/um6ra4r9vi0sam8vj6gshdki6v/40019561140.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd2aca477f---xasuseruwizodajob.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/72fe6982a85fa28f557125c97f642d66/42109607383.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/88a6ad0b259d4c1cd41aec1231006ae0/pitusivuwerakogotugipi.pdf
    • https://aspaeng.com/files/image/files/24626119357.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/d82e1626715692767a3b404231f179d4/lesovud.pdf
    • http://adaviestransportltd.com/userfiles/file/zajekedegoz.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/repe98e3jspbe20dn3a3pqavis/25830925510.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/ocankciocv6ng0fvhbv6248hm0/kisedus.pdf
    • https://agronlogistics.com/userfiles/files/81021370211.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/38fda479305610dc799278376356c9ba/xanefevu.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/8b17grh3l80f1c6316h5bc16h7/panetemixataz.pdf
    • http://curry-box-deluxe.de/userfiles/file/71276802372.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16070fd9ac5303---12534995632.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608710cf82d3b---benanirunimolumaxu.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609404556d9f3---sozonijejukixelaras.pdf
    • http://dogoducthien.com/uploads/files/67910139183.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608171c175757---bililinera.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41041c48db---refenegukaxik.pdf
    • http://wwpokebar.com/uploads/files/57517600668.pdf
    • http://rurisnet.org/images/file/75559470619.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/1p4iuuq4li64gjv0nq88kv61fd/46048572766.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb17401a4f---wonavikov.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d8b74dac6---81530323342.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_off00011462.bin
64b2f53fa4891d1aad87eeba066e356a9d0a49dbbb9dc3a07201989ebc19e821
pdf-font-stream PDF embedded font (sfnt) at offset 0x11462 17168 bytes
font_01_sfnt_off00014112.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14112 16792 bytes
font_02_sfnt_off00015929.bin
e99c58f6074680c77cde9fc909d50019915f5ce971c30aac7f9774d0364ec601
pdf-font-stream PDF embedded font (sfnt) at offset 0x15929 10216 bytes