Malicious PDF — malware analysis report

Static analysis result for SHA-256 0feebc7289d80578…

MALICIOUS

PDF

80.3 KB Created: 2021-09-05 18:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6941195dda3b72551ac4d63095e1a86c SHA-1: f026cb8e58491739a6afb0c06177f0cffea991e4 SHA-256: 0feebc7289d80578f449182b826ccea23fa95555b3ce666b39ad938d221e7529
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. No scripts were extracted, but the presence of multiple compromised domains indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107a2b91651e---10436255848.pdf In PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/qbb1ma1hvu1vge4sv0n0s3om09/46267753478.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdda932634---vovaxidumixukanul.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/60914434710.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/315f69a5e39cca9405ba8751f8b39a48/99976560917.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/50e8gq8f9dnqsdttf95iip3hd8/dipakabalomexozigozonu.pdfIn PDF document text
    • http://sun-eko.eu/files/file/97361142638.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/4428735521.pdfIn PDF document text
    • http://keacg.com/upload/files/jilejokirixekaro.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca13a26a11---52713088025.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/36965984248.pdfIn PDF document text
    • http://dzbnf.com/upload/file///patosafitesewi.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d77be7d412e---pelunokowirenewubereluta.pdfIn PDF document text
    • http://albertaracecar.ca/clients/49797/File/lagitunedusowo.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/xobenu.pdfIn PDF document text
    • http://www.enredmail.com/templates/files/idCliente_/file/zejozetezaj.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/sefiraditeroma.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/481cb86d9cc4b467910b98351e156ce7/20614015813.pdfIn PDF document text
    • http://shophouse.info/images/files/xowelubegakovawu.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/201021177345.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/vowaxekenetopimu.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/45324600918.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8623ed4856---saxeno.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/varabe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=emergency+manual+pump+for+wellPDF 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_off0000d73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73B 16968 bytes
SHA-256: 2ec5a79989529235962ef4e74483fd6cfc49df036f142088dd90b7976d343159
font_01_sfnt_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 10748 bytes
SHA-256: 38913fee50d37aa09ac97973ec3d30ad1cc2ed93f941e851b22a4c103d69b9d1
font_02_sfnt_off00011bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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