Malicious PDF — malware analysis report

Static analysis result for SHA-256 652b889a08a2d905…

MALICIOUS

PDF

89.0 KB Created: 2021-07-03 23:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 137504d1634296925a3d55b02b064456 SHA-1: 4d12b0b8476dea9db50cb411ae2fb132effdbd3d SHA-256: 652b889a08a2d905a15c4b65c02b504b4e5fc00893c85f47b5dc6c6fc285cc28
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and the nature of the detected heuristics strongly suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pixomot.ru/uplcv?utm_term=j+words+meaning+beautiful PDF link annotation
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc4400b6af2---jumenuxipug.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/womevawokorevarirufeje.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/84605318050.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/vivunumo.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/16ii2h32sa82aggsp42ftf9p87/sitamezeguki.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/2189356297.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/41872851496.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/sv8kl15qu7419rshis5et9rpan/sotujuzo.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/3509338112.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1bca70413---91294091892.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7d409acce---vepafojoseribizorovajo.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/40716466762.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/4f8126aee6f11b6408a06f5fb6777ac5/32687396981.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b7acbee7b---51938437648.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/31444831328.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/misebexezixuni.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/56465801574.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/l4q3pemt7eg8hvquj0tc72aref/56816558974.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/0db1f7cbd44c242c783acc572704b104/98293140463.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021061912552670554.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/0ebf5d7802c0055f9e21bd2946fbda59/37446669659.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/31767950378.pdfIn PDF document text
    • https://edusfera.pl/upload/file/55123000870.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/691283cb3f1a3348d37eb3ad19cd2330/96666181004.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_off0000f90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90F 16932 bytes
SHA-256: 62b4f224d2bb6a1c043b24f3c6c3f0d6a1bc4f23548ca42fe0875ce82dc4d851
font_01_sfnt_off00012556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12556 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D6D 11012 bytes
SHA-256: 9ea870098b54c409f6c0e1a53bcb35098b22131da9864fe21877f583674bb48b

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