Malicious PDF — malware analysis report

Static analysis result for SHA-256 690e583f4c1a3381…

MALICIOUS

PDF

84.4 KB Created: 2021-06-26 18:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2324f1eafcc552554942478b3a0abfe0 SHA-1: 4490be4262f9ff6cee583105594864f48f636e3b SHA-256: 690e583f4c1a33818b117bb3e3e940a12ba383f246bc4d1555f1a08fa38919f4
156 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains numerous URLs, many pointing to compromised CMS upload directories, forming a link farm. The presence of these links suggests an attempt to lure users to external malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/2dec73d0876a055819f72a22f238cc04/69148955486.pdf In PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d95aa43f90---kebovenuxedadovutuzugo.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/55829413105.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/0qgk2rol26kfghbuuih53d2eeg/jariditasimijijapeguro.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/71726f00e95863a494070b404bdd4387/basuwigokiwonozip.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/480b63a10a0427370537150b307c7254/43881128786.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16083a56fe3227---813608893.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/22063475713.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/kezajexebijimixa.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1ba0ec6ce---zafunofikevejuji.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/63361131461.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c6965d435---zulunatix.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608592e6a0353---wasol.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5aa58bbc3---nakawadalesupema.pdfIn PDF document text
    • http://esistore.be/userfiles/file/vokifituwonaboziwinipewur.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/95144362884.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf9331e4a2---wedolonupaga.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/1daafba9dedaaa9253d2ba10178d3959/90051374706.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7b6dedf05---fitisapumolajigozoxel.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/1be985de88dc231b65ed6917cabb3964/57724240437.pdfIn PDF document text
    • https://whitesal.com/data/images/file/8750_20210603164436.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/339f7b18d986447837ebe3901fab8160/73514119099.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/37331174691.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=chapter+6+radical+functions+and+rational+exponents+answer+keyPDF 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_off0000e1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E3 11408 bytes
SHA-256: 4efdf0ef37d6bc4392f073872e75ef5f4a6f43c90ea8bcc7d8065ff151fa4e6a
font_01_sfnt_off0000fce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE3 17160 bytes
SHA-256: eb3d780c88ee8a1d39b54dab50e2531f4dc61e96f382ef20f9bedec4890036c8
font_02_sfnt_off000129db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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