Malicious PDF — malware analysis report

Static analysis result for SHA-256 e100e936e9c47df1…

MALICIOUS

PDF

85.1 KB Created: 2021-09-11 20:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 92bee0f6cc1572f86c436e3ca4e448e7 SHA-1: fd6baf6baa764fd4106e7660fbdac4200be688ae SHA-256: e100e936e9c47df1acd30f2061fecc7dc86c87fe0c66743c19d70891e61fca3b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to various domains, indicating an attempt to obscure the final destination and potentially host phishing or malware download pages. The ClamAV detection and ML classifier strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dienlanhhuubinh.com/upload/files/luzudulirewe.pdf In PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/zabexikokoromawejore.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/riwoxudivobiwowedo.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/rufet.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/firerotefijikava.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/duxumavon.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/katibobagizus.pdfIn PDF document text
    • https://svltv.in/userfiles/files/47308900260.pdfIn PDF document text
    • http://js-space.de/userfiles/file/71738521862.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/80647498698.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139913faa9ea---36722746787.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/58759529378.pdfIn PDF document text
    • http://cheliabinsk.realxenon.ru/uploads/files/mixijafasal.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/69512583667.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/3405375078.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/dikadotote.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/uqovfqdmsg2ejvu3jh3cco8a49/lasikemavexodiko.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/66750803132.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/16770436055.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/24377185311.pdfIn PDF document text
    • https://svltv.in/userfiles/files/39398405490.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/95673674632.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/babajerulaxonanejabuv.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d67aa26cb---sowivelininegilari.pdfIn PDF document text
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/50715457858.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+name+it+and+claim+it+game+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE224 10644 bytes
SHA-256: 0adadaca88db4937723048770d291fe6077a5bd9a72c80cb338b2ebd8e293b2e
font_01_sfnt_off0000fa04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA04 20032 bytes
SHA-256: d2e4e2affe8e86afbb245103744a5062557e0a8304945541c6af04cf0439650a
font_02_sfnt_off00012e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.