Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6f3c001afc4593…

MALICIOUS

PDF

86.5 KB Created: 2021-06-17 05:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 94739c25a8b435993e086064c44805ce SHA-1: 38697e3503bb8185997f7f48d27accf34eaa17a3 SHA-256: 4d6f3c001afc459344c46f1b9584453158c4c6959ba3eb43426404454db27761
156 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and numerous external links are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://oniceh.ru/uplcv?utm_term=film+innocent+witness+full+movie+sub+indo PDF link annotation
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/b5d3s65maukeqhmntsoicgjlh1/lunarilenijalewozoro.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/bowujebevumaxuki.pdfIn PDF document text
    • https://master-service.ro/images/file/77832600888.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf8e7ec931---wagojizisazizite.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160a2308bd393f---21909397202.pdfIn PDF document text
    • http://normel.org/files/upload/file/xinaropuwefa.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/dizatavavunok.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ddc1d5629d---favedejivax.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9fb30559f---65648679416.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/97412173633.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/422ed36ebc9f58be7f1bf272dfa1e1ea/2207634431.pdfIn PDF document text
    • http://skoleniridicu-online.eu/ckfinder/userfiles/files/dogodojipu.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/lafonejinaxazovinezofikiv.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16098f2cb57918---47407498855.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609649af23b47---57718182332.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/553db6c8582d0f6859ef2ed5fb0c611c/gasaneteloruxevemalawede.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/tnvosunhiao917edhbjd9anhr1/buvosezagebuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D9 4068 bytes
SHA-256: c51b2d3db54dd0f93b8c073c6499a22b17d1776e2f716cf974fa8dbb600bfa42
font_01_sfnt_off0000f23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23B 4992 bytes
SHA-256: 5c923f5860b1a429394e35840610bdfa19e848ef585a592ca58aa8ba1fc42fec
font_02_sfnt_off00010330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10330 11040 bytes
SHA-256: f36d98cdf31cb0198a34b4f5d25467798451e78dbac05ae9833eace725d48b9f
font_03_sfnt_off00012926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12926 16064 bytes
SHA-256: 62057359ad22ed6c79ab6a94c34af50e7f9192dd49eed379a27769cab1f8071c
font_04_sfnt_off00013db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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