Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2901bba72aa3fc…

MALICIOUS

PDF

87.3 KB Created: 2021-08-10 17:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 2844a498cb21d34e85b3778accbd6390 SHA-1: b9db019fd41d2e3dc4d251a3864775a0573a8fdd SHA-256: 6b2901bba72aa3fc6103b0411071d526f1720575acda6e06098dffe0b6a7c10e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://crewmak.ru/uplcv?utm_term=la+biblia+griega+septuaginta+natalio+fernandez+pdf PDF link annotation
    • https://kar360.com/resimler/files/figujutur.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/2f46af5d80d40b7a944e77709bc05664/86946673526.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ac0235a1b---18360698668.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0084345ba08a89f6b81f72e2f95d7fac/nesafumitedobakinaro.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/5d50b35331934bdd15cbb9a853e1b642/wumoridu.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/c84f0798ce54d3cc65253ee72c4d1fb8/jineposapojiwegumoritunu.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/fbb3b4c6c097629982f5d322e35d3b08/sofibiwaxu.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/dagevawa.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a64162554b2---zasatamekusagogugifo.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/981c6ea0ec66ea5bd2950290fe61139a/11420895900.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/69277205876.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/273535ffff206ab8dcfcd198a2284e3e/37495612751.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/18ed67b192486a41abe2b2517ead534f/mawedowuzosuxetej.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/21058188151.pdfIn PDF document text
    • http://hphs1958reunion.com/clients/47465/File/93489730563.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/fv3jq58dj3upm91auttg1l14lg/66145337774.pdfIn PDF document text
    • https://norservis.com/files/files/88194792739.pdfIn PDF document text
    • https://silky.ae/images/bulk_images/files/matezalerizegopapelukuju.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/m78a6mdq5506u30mfl8cbk7v0h/vilekojamesixam.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/5668064bd8fadb6f656704f7cce2bfe8/jezidoran.pdfIn PDF document text
    • http://starsunited.at/upload/files/ruribu.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/tutijimekodezob.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/u1mr8cgnj5h50b0a9fsn3dg0ha/52607734005.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD9 10928 bytes
SHA-256: 0891ab3ba5acc8c1c4577d687032df8109efe5d297fd8939773666a2c9b59009
font_01_sfnt_off000104d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D6 18684 bytes
SHA-256: e5e6b4758a54bef48958eb2c99a039a48dbe858fa28e21672f9dfb03f02dfd6c
font_02_sfnt_off00013485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13485 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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