Malicious PDF — malware analysis report

Static analysis result for SHA-256 42afd2ad6f576e15…

MALICIOUS

PDF

83.2 KB Created: 2021-07-06 20:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 781c4c38c4645b3f712cee0e05388203 SHA-1: ff53a02bf62dc4ba80ba7839af2b229b0ea55e72 SHA-256: 42afd2ad6f576e15f55de9624ca192e02d84ffe7190722e70c9eb7f50cfc24a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://smidgel.ru/uplcv?utm_term=santa+claus+with+sleigh+and+reindeer+drawing PDF link annotation
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/4c53c27ece50033921419d7f4482e01e/10757818867.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608567cacfce2---33536066550.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a13f3b255fa---dapeba.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/safalolubokakanofumolidiv.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160aae68ab2b16---kesadofedepufipepilikef.pdfIn PDF document text
    • http://congtyvima.com/images/Download/21434787959.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/22546723360.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608df0459736d---11863079403.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/f9677701204cbbdfc72d52c9fc40b1a3/lekiz.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/ukgimg0fbj28c014a5ko6levb3/budaguf.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/vutudafe.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d7a834068c4---lowosok.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d3a84f7a964585c0c28aafa72af966aa/16920538352.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdeaa2744c---91413067154.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/83711811633.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/witinemi.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9b168803a---riwupibivuk.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/27713744748.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/19896427399.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/e3e8f742d516f7d025339b6ea489fc9a/puxizu.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/49353347900.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/tr8he48spe2l5f44f1tku1jes3/kizivevefok.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://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_off0000e7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E3 16640 bytes
SHA-256: 70306754a2d6786a9510897765d3d88b42fc972f009e0f13503b8a9488d201d0
font_01_sfnt_off00011312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11312 10788 bytes
SHA-256: 7435e34a3c74443b828a5ab277f0cbcb7383d80b5517baa23bd3bc010783a72a
font_02_sfnt_off00012bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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