Malicious PDF — malware analysis report

Static analysis result for SHA-256 801010f913de674d…

MALICIOUS

PDF

98.3 KB Created: 2021-06-30 20:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a5f8227066905bf897d9abc08a5c837f SHA-1: e60c1d99d32ce74ac9e723f2366eec610067ebca SHA-256: 801010f913de674dc54ce30aaeb2d72c638ec8dcb576056a9ad5c126c74d76f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with phishing lures designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/57259196411fb59127200bc2132da1c3/16512231464.pdf In PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cec002e34---kotep.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/sodifozofogirik.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d07c5ebf21---35477816673.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/46161744541.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/texikipa.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5ee1d7704---remekikubinaraxax.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/32ae6fdea0682cd762b2172468324ef3/nixekuvelibexebubipu.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/fc336a8530a0c0a3e4eabebfcc999478/bowowajad.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/zijinojetusopeludom.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4440c791a3---19672159097.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/63521053937.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/d3e73529c4059a78ba077d47d65b3525/33944517963.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/46588829135.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/8oq7lvlq55n0d0nbq76fctkg8g/61035822149.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/donuredokowuxuju.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/3657c56eaf354f8dee6fef4246ba1d84/tewewupakujuvilokukotozus.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/qtakubu7r2jfmnlkvb2469rek3/latar.pdfIn PDF document text
    • http://quatang3t.com/upload/files/damajoba.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2f0ae8ee8---58616977124.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/e2fb1c40774dfcf0fc82f83a2e942df7/26040069174.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/wofulezuleme.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c790549a2f9---67488314254.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+host+a+lan+minecraft+server+with+hamachiPDF 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_off00011888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11888 10744 bytes
SHA-256: 8b9f4b91c525cc8eef8a0401a59028577515120706508e65bc789d7e5fad6fcc
font_01_sfnt_off0001310c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001491e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491E 19864 bytes
SHA-256: 2ac17f1b322ed09a6665a060012deee923e8c73462ef7361d9a73f9fec7dca01