Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a183aedadefebc0…

MALICIOUS

PDF

89.8 KB Created: 2021-06-12 07:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3fcac62905c8b2d0c8bfec746ee4f658 SHA-1: 0c6821203210bd1075788dcf70f9cf6cba5b14b2 SHA-256: 3a183aedadefebc05b0936f607589ca5323025fd0f08a7aaef204b72f0daea40
96 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple external websites, with several links pointing to compromised WordPress installations. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests an attempt to lure users to potentially harmful sites. No scripts were extracted, but the overall structure and URL targets point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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://crysiq.ru/uplcv?utm_term=jai+hanuman+gyan+gun+sagar+child+voice PDF link annotation
    • https://jodhpurtravels.com/nbloom/fckuploads/file/sanuj.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3d41b86b9---kivabe.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/1f25a85419afb53e6ead93fba9bc70d3/pitisonuxeviti.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d52db86bba---71418672627.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/8148411e36639b50e05a7f50d0853e73/xutizewoziwejalutovabef.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085064263382---furosapiguxesa.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/tunekow.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/006oc16lvgkjeo7rdieu3ovud7/12640394162.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607128708217a---53563439379.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609df6cb2d56f---29262416711.pdfIn PDF document text
    • https://menu2uplus.com/images/file/93855233328.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2476cc4589---panavafidapavasokawizogiv.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a89acce3187---84410126415.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/74377135562.pdfIn PDF document text
    • https://zulapin.com/calisma2/files/uploads/punebok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/0f847a0ddff60750e086f80adac2a62f/79453965844.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://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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CE 5504 bytes
SHA-256: c8748568acc6b3b9906e12c763c22b10e27e285cc4675d46b97cb7547c2533e7
font_01_sfnt_off00010469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10469 11664 bytes
SHA-256: 5b81a76b331cf3c241e39169fe851d84e2d33f06522ca6312e5395380df8019e
font_02_sfnt_off00012c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C74 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1
font_03_sfnt_off000141c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C8 7028 bytes
SHA-256: 68408937821410ff8f1729745c3039b23dacdb0e2293052ddc72991cb5c72623

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