Malicious PDF — malware analysis report

Static analysis result for SHA-256 47fb3eb588dc1991…

MALICIOUS

PDF

90.6 KB Created: 2021-07-20 18:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ba45bfd3cad9a78e25c6c0afd2c8c10b SHA-1: f01c3997d93f2cbe06fe850370736210755f2093 SHA-256: 47fb3eb588dc1991c6de677de87a4df4a28a6fe2bc457264a62d65a0017d7e14
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate the document functions as a link farm, with numerous URLs pointing to potentially compromised or disposable hosting. The embedded URLs are designed to redirect users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://tikatalog.sk/_files/file/85177949281.pdf In PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87cce095fb---nuraral.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tukakogulatumoketir.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c81d2e208---30171592514.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9d611a295---dujajusiwumoja.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/busasu.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/wubisopenimutuk.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/dajuduliwomigojedi.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/xudikibobemi.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092dca7754c2---3885054050.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/zabixupokogijegadira.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/2fa36a329161270b93a5df572166f007/50232345709.pdfIn PDF document text
    • http://gdwtechnology.com/fckeditor/file/6766639593.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/p09tk6qu56kuf9k01l69g3mm3j/tobuxed.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a00c1b99236---fapugodom.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/jovebopojogexomewikubujef.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/nedibezi.pdfIn PDF document text
    • http://texmet.pl/userimages/file/82903476977.pdfIn PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/zifewob.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/rukafogoselukajinun.pdfIn PDF document text
    • http://beiks.info/public/file/2989814329.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=xnor+using+nor+gatePDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/7aed8be908d0b7c6222a78075ba8843e/soxetejunonopotiwogix.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_off0000fd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD37 18256 bytes
SHA-256: 663984f13529e66116502cdad1d4944b53dc6ee7694d6f7c52d9e2507572cca5
font_01_sfnt_off00012df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF7 10344 bytes
SHA-256: e4c98640f2b638f1ad99af21ac5d02b00afe4b5c5b61dcf54ae8786c566d263d
font_02_sfnt_off0001457f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1457F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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