Malicious PDF — malware analysis report

Static analysis result for SHA-256 12117664e426bdbd…

MALICIOUS

PDF

85.6 KB Created: 2021-07-06 19:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 620e7c90c51581f24ea8f7eea93580b4 SHA-1: 375ef460dd659f11605219d93215573f5277b5f0 SHA-256: 12117664e426bdbd7726a16a7bdb9230bb16264a4cca24c73c664b13e6a6f3c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or malicious redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure itself is designed for link farming.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/df5037806a5f3084afeea1a6e772c60e/8385212421.pdf In PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/238b8b6245421d5094ab355d022447fd/48044101983.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/90243090993.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/47050096729.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/bobolunilozigix.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/vumifibegekut.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/76aba6f34293a9ed5c43b34e78f4362a/xejujub.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/puded.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4027b72f5f---xixepoxedudixajega.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/f365ff2bac62a8ed5d036c5413bfcbe4/21910523189.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/75338360206.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ddf950aa3---neniri.pdfIn PDF document text
    • https://ntwbearing.com/UserFiles/File/futasexoxatilevosa.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/93990474368.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/66731177486.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/kukulokizegedujiposa.pdfIn PDF document text
    • http://cymrozgreatdanes.com/clients/1/1a/1a407d8ccac5525c71aaafb6b4664123/File/40697119050.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/15148460535.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/78920943882.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/mokubovawatadaf.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/93d1436508f50232da9a1e24c9362e44/debedosamapodegaxab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=court+of+appeal+sixth+appellate+districtPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/61e87d51280e4a8b111e43a3dbf7dc40/26259720891.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://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_off0000e99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99F 10848 bytes
SHA-256: 633a6d95bb086cf55e768da27e6837e82a00462156e851f8e4bb0dbeb74d3203
font_01_sfnt_off000102e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF2 17704 bytes
SHA-256: 12aac9ff8ffd0419957a3aa370f82ba438cdb0aef1b0969e0af08d63cbc5d12c

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