Malicious PDF — malware analysis report

Static analysis result for SHA-256 8924032b800ca70e…

MALICIOUS

PDF

82.3 KB Created: 2021-07-03 03:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ef291f165dd28783a038b1b8eea7d4d5 SHA-1: 7da11b749ff715e9b3560a3ef1678de9952bda76 SHA-256: 8924032b800ca70eaa6a74f1c8224b389de9a1ff904348e3bb908583168ec9f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages, serving as a distribution mechanism for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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://ketchas.ru/uplcv?utm_term=the+land+of+stories+fanfiction PDF link annotation
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a47c09b4404---87527948903.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/ebb2ec793fdde5033b8f847ae5433123/fosikibonupikubujodudud.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/17129612897.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/35625dab24f0e6900e3af202a0a9f751/84809323959.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202106file/2021062903195870554.pdfIn PDF document text
    • http://cke.hk/userfiles/89089085129.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/ed7f8d27ba869b8e63e691c68763eaf2/vujuresakejoxup.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/c0efaf13b6cfa82cf21137c0e7a18506/96651567271.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/fonudodopiviwofafov.pdfIn PDF document text
    • http://marty-triple-m.ch/inhalt/files/86605888508.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/3ffe4e3f6592bcfdc4f7340cd3000e9c/gukoxonip.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/tewupil.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/65555130660.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/telawuketoj.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ema94hvajbaljju7c0b6pulnm0/33712955218.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/gvfdmvsimm37s8d9njs9sj4abd/20310175721.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ee523889e41fe7c900634d947413d02c/49220893492.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/kesaxolugoboxajekikoki.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/xosebogozirokixabapabam.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ac4ec876c---9599458352.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/wiwumezami.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/73642996609.pdfIn PDF document text
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/56750001354.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/4cc871dfd0c4cd21db68c0e77d85f745/80867493791.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FA 10536 bytes
SHA-256: 3d9174f93a65f72e00660109566c1e3e377702a1f9866c19da916b668e4853da
font_01_sfnt_off0000dde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FB 16940 bytes
SHA-256: 10e05a508882483b86a1b3d9dd527ca9b20a620e3f36428faa6965bbad420e12
font_03_sfnt_off00012272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12272 16752 bytes
SHA-256: 7c1a8eb0b9c23cf203c969b5d5d5631f8eb4ae760335902abb309347e0b2a7e8

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