Malicious PDF — malware analysis report

Static analysis result for SHA-256 884c5dde2169590f…

MALICIOUS

PDF

78.5 KB Created: 2021-09-03 11:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 13a3ffb3fd4176512067f0f6c1e710cc SHA-1: 763dfcb6cf2ff0e68230e44315e3eade1fd5dd0c SHA-256: 884c5dde2169590f7077b074c5e49d4566163bfcf3177b4bf83f0d8c3ac156cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with multiple URLs pointing to potentially compromised websites or disposable hosting. The document body is unreadable, but the presence of numerous external links suggests an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/71811670d5c66d7a4373f7c03ceaf4a6/rotigu.pdf In PDF document text
    • http://francisfamilyreunion.net/clients/870293/File/82219205587.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878bd4ee7f5---kegutefepigifipiwuwez.pdfIn PDF document text
    • http://norservis.cz/files/files/kotekuv.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d19fe492328---99938972492.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/vegeworo.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16084e60e97a78---26571545844.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/ditadidiludaki.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/suweg.pdfIn PDF document text
    • http://civicwomen.com/ckfiles/files/84782280852.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/d1e2a9b2f972b9053fd74c2bc2ab526c/jidupujow.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/55738176576.pdfIn PDF document text
    • http://springbook.no/files/ribatomixe.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/14ffccb3d3f20b488700426bd70bfe25/zukiguwatoset.pdfIn PDF document text
    • http://www.motocams.cz/ckfinder/userfiles/files/xejifosuxakonebo.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce051c931b---tivefopefiviwa.pdfIn PDF document text
    • https://yellowstonewildlife.com/40504016646.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c955760918---ruxikegobejimezawij.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/47551765746.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/jobimipi.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/daxevifafofulimezo.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/nixowelagak.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/21964765664.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b951fc17bfe---13794283709.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=formulas+de+integrales+inmediatas+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_off0000cd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9B 10920 bytes
SHA-256: e3f071a71b94012dd78b5993380318894b6a9d4745d2dd6f549a3afb477cd3df
font_01_sfnt_off0000e6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000feb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB2 17864 bytes
SHA-256: 066bbc16c5e87ebcfdbff1080f6ecd9dacb7bce60a4715ae3a568703368624df

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