Malicious PDF — malware analysis report

Static analysis result for SHA-256 34291978929e6e8d…

MALICIOUS

PDF

74.1 KB Created: 2021-08-28 10:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 075d9303d6fc5f66dfaec22ea5b56b0c SHA-1: d539cff26202a98b76e7538615d0ea45742bafa7 SHA-256: 34291978929e6e8daff60df3fc22c7c719c0e0d116aae6b47aada776e3e326be
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to redirect users. The primary purpose appears to be to lure victims to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107dc9b930dc---40671758955.pdf In PDF document text
    • http://hoggard1975.com/clients/a/a4/a43fc1111b7ad4318f8b553feb79a890/File/34975105601.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16088296ccf213---66546387284.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/b272e42f06bcb73e5b0cb49978428135/8400138509.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/73107020430.pdfIn PDF document text
    • https://dm288.rs/slicice/file/86535882618.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/7a5d133e11fd31223570e6e52589e802/jilesugubisoliwofofi.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16086837dbb933---15627228998.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b982f0bbc8b---41295523620.pdfIn PDF document text
    • http://www.asslar.de/downloads/lirudo.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/bijusigobotifirularef.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/e9bsndbnbbdi79qobvi9v15nu4/juwanelitaboxobabatejar.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad709da21f3---kalesesutewurupovelolaxom.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/xunugajemivo.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b34433e74b8---18105737066.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/25356454291.pdfIn PDF document text
    • http://d4scanada.com/clients/8/81/81a8d3ecf29e0a7d9042e8364394d873/File/8374221178.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160e175846b9cd---xuruvopumosuleta.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/tufuzojotidi.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a930f272b20ab1194aa8c2950e186b8a/budosa.pdfIn PDF document text
    • http://yhbinternational.com/userfiles/file/4915795467.pdfIn PDF document text
    • http://ahchala.com/img/file/sowujodorobatebuguzew.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/gitepiziz.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/76110640438.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/67150359817.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=bad+boys+for+life+movie+freePDF 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_off0000be93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE93 16620 bytes
SHA-256: 32bf18768843923776eaaaaf639ff7fd258279e23c6c5e8bfc8189b12460fd3b
font_01_sfnt_off0000e97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97D 10688 bytes
SHA-256: f1bb9aa045e52403611a8397d764e7a5c560b4af8df5ee0ccff908dbb43ddc9b
font_02_sfnt_off0001020e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1