Malicious PDF — malware analysis report

Static analysis result for SHA-256 50606b26d19a064b…

MALICIOUS

PDF

69.4 KB Created: 2021-09-18 15:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 87bc59b8d41782984bd9b373fe58d636 SHA-1: 3b05fc78a18c18a4c767d4b0876dbeaa7a652e52 SHA-256: 50606b26d19a064b70839304c6068e683411c0682de76727b7bad23a72fb10f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous URLs pointing to potentially compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are designed to lure users into clicking them, likely leading to a second-stage payload or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wccflooring.com/userfiles/files/bagadebejokibedumuxun.pdf In PDF document text
    • https://ehlibeytalimleri.com/resimler/files/putiwipesinazujewupax.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/702045133.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/161456ee9d6ffa---zigeximanulu.pdfIn PDF document text
    • http://retrolondontees.com/userfiles/file/49834293114.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/73746212219.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/88043188543.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/lodaremokakuto.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/noseguxa.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5ce55fd5f44501fd5dd5a1607c8459a9/guxamabunejugaposuje.pdfIn PDF document text
    • https://usgcambodia.com/userfiles/file/bimikuvexewivewefibar.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/161452efe878f8---67523620637.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/xevapitevidavepeminozosa.pdfIn PDF document text
    • https://www.douggoodkin.com/admin/ckfinder/userfiles/files/jadotos.pdfIn PDF document text
    • https://dongphuchuytai.com/upload/files/tudisilosamelevisav.pdfIn PDF document text
    • http://odontotecnicacoop.it/userfiles/file/20765059339.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f2e3010e4---jupixujugorejorukiziri.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///92090364599.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/76131458949.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/17463215928.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/burefumojuwexaguxexupen.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/tuvarurasuja.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/31266480624.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=private+account+followers+viewerPDF 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_off0000b3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE4 10580 bytes
SHA-256: df6296b973b1168315d1160297841d67732ea0274b6e8545ff91c628199fcd52
font_02_sfnt_off0000e444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE444 14328 bytes
SHA-256: 34cb85258b3d8574ac50d205429c4f51a1211f8113d7365d09e6e04c90028be3

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