Malicious PDF — malware analysis report

Static analysis result for SHA-256 84dda6089da5eb47…

MALICIOUS

PDF

91.6 KB Created: 2021-09-02 10:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9b687bac28bb00a79890b6baa814bc2d SHA-1: 5f77b73b01ae1d22141440d62ec611dd661d74f4 SHA-256: 84dda6089da5eb4738aebc68d3619213af16360829a8b4a676ed9950bf474d21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised WordPress sites, which are likely intended to host or redirect to malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically related to phishing and trojan activity. While no scripts were directly extracted, the PDF structure and link farm suggest an attempt to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://picassogift.com/Uploadfiles/files/11668794394.pdf In PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/gitapasotimujerawalaxu.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e571d83b2---85101618299.pdfIn PDF document text
    • https://123natura.com/stockages/files/jerodapepulidepowopek.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/1763113473.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/88528026399.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a95222496---gasuzufexemimoxasip.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608f724c70b9e---71321826727.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a31f71a13c8---35193432975.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/90194110277.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/zabolorumixosal.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090df69d9056---ledot.pdfIn PDF document text
    • https://superchills.com/userfiles/file/54368597961.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e40b378ca---nogajapuje.pdfIn PDF document text
    • http://normel.org/files/upload/file/64795872204.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/050207bf4552860b28408e9b0aa0585c/10707642675.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/wabelejemafe.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0f667c182---rakezatopatiko.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/36257064224.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/28584664821.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/45600108947.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/e18c79341640eb09cfab6f1595b4e7ab/59291439392.pdfIn PDF document text
    • https://trvstore.com/userfiles/file/fuzosusasijuduxep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=labour+day+started+in+indiaPDF 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_off0001009a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009A 18404 bytes
SHA-256: 4c4541bc35a25bb14c072f8f863c914aaae2a2634b52b8c83eafdf1cbbd26ea1
font_01_sfnt_off000130bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BD 10504 bytes
SHA-256: b2fb3454baaf1b3a7103171334cd53ad77eef5328688434b5422d5f69ddd78ed
font_02_sfnt_off000148cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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