Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d3660b2e938782…

MALICIOUS

PDF

88.5 KB Created: 2021-06-28 07:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 353ccb23d0a243728d8966d5d7c1835c SHA-1: 9c6f25a493fb928baada2f667df8ec26d3b97e1a SHA-256: b9d3660b2e9387828979916def973047cfbf168fcd28c8a724e9a8fc9df44078
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites and disposable hosting. ClamAV and an ML classifier have identified this file as malicious, specifically as a phishing trojan. The primary function appears to be redirecting users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • 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://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/b306cac264501e89f1c4bedfaa19c17d/kenisisotolomigaf.pdf In PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/fe66c6a36db34fbe728d0ec5d7ef1b5d/kupegeresijuwa.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/aiuh5pe23uu4u5qos1a2t47bae/pukojenexeseziriguf.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efaa420951---7776102565.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/2ec735e8c7065a57c597248a96f85a10/losifaser.pdfIn PDF document text
    • https://triosms.com/userfiles/file/zefipox.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2465dc90e---68587369059.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/3adc01fcfac94fab7d9d8807c215c5f2/43546252389.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096aa6ad9bcc---suxexemuwurudumo.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/83v1lq2s34odppac7hp0rfdmun/16045707370.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cdce5922452---71897345302.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160716e1e30166---vesumegowex.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/77625080563.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/fenili.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/f20ccedd6766b9547f8295c3f14f5037/zapiwuwaduxisijexuxi.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b65bf87ec84---2458209664.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/82774f5ff74c79635c2086d8873f989d/bibeto.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/malomogugasor.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812d6829ce8---620290516.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/gh636bql9jvcjir1kto53u5j17/tivow.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/papavinulega.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/dalodirapevi.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/684046682.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=mass+on+inclined+planePDF link annotation
    • 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_off0000f4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCA 10300 bytes
SHA-256: 3c51ead915acba964f066a60160d53b87bfa7406bba50c3ab03c3b9f7f55faea
font_02_sfnt_off00012410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12410 18288 bytes
SHA-256: 37ab2bd9ad66bf1b1cacffa5c5ef4ac04e80bc764cc9fd1e2aae1901893751c1

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