Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e42f8f0b86cc75d…

MALICIOUS

PDF

89.2 KB Created: 2021-06-28 05:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be0f64e20c860247b5ca68b22e2c860c SHA-1: 2125061b93f9fa1979e7a33a746a7bc5df0141ca SHA-256: 2e42f8f0b86cc75d95d337b52d6caf3b17402e436777879f3ea8f9eb3a764562
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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=fisher+price+deluxe+jumperoo+manual
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ub542ckm86sasulelkrajbqei6/48455946542.pdf
    • http://noospc.ru/SITE/files/editor/file/78309062661.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/6d323aaa6a9fe204c19948db83c634cc/jisosuzuxopuveg.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5689900a8---30963366930.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160816cd281546---46713591224.pdf
    • https://boyanbolyarski.com/userfiles/file/58570116670.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c97fe8f3a---jadapojotusoxobuxubileti.pdf
    • https://audreyheselmans.com/_files/file/18309595321.pdf
    • http://easttbirds88.com/clients/d/d7/d767393c090093bf18db16876c07b5c3/File/92579133027.pdf
    • http://asiavent.com/UserFiles/file///28780981767.pdf
    • https://termofriz.rs//files/dikesixiver.pdf
    • http://stellamaris.cz/userfiles/rebalifabapif.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c25bd435249---boxujatopinozatiwe.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/10lsqi5tdvl4k7lfj0lafb56h6/rexumavekiloretot.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/o1j65g7gt238ef8pvjmsvf7oip/wapefod.pdf
    • https://actor-conseil.com/files/file/86713655670.pdf
    • http://nadiadsa.org/userfiles/file/39817629945.pdf
    • http://orikon.net/Images_upload/files/15412113899.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbdfea13af---38071181759.pdf
    • http://dlevitin.ru/fck_editor_files/files/javebawetepelosudevupa.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/a1a2f2fbde8d9742dc0c67b7036a4d45/42460723848.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e6b2cadae---wedowidawatusiwafitag.pdf
    • https://castilloexterior.org/ckfinder/userfiles/files/tujoliwegudoxuxekavojaz.pdf
    • http://hrjok.com/uploadfile/file/71563138662.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/bl08obqfccdigtg7c12japuqe6/muveved.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/4ntr2mi6edf8rmu4udjfn97loi/25733345345.pdf
    • https://sgcaregiver.org/contents/files/kuwivotidokefupadosemo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7c2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C2 16792 bytes
font_01_sfnt_off00010fd9.bin
d360e5e58ce513f9c9c2f6f6950ddc3d593705b76f9b60e1f88d05a50f93728f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD9 10988 bytes
font_02_sfnt_off00012919.bin
27759a16fafaed6a348c65299f06cc7c6a8f4045fd30c972b2d3f58b82b505ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x12919 18036 bytes