Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e36e73047b9aee…

MALICIOUS

PDF

81.0 KB Created: 2021-09-02 06:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1e058c74e83905f1a0727a0cb5864cb8 SHA-1: 88f447cd08a25aab72e16649afcc21985a8ced6c SHA-256: b5e36e73047b9aee426f40a2b5660dad7ca3abefb5d0f243904e537d5fd8a3fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to various domains, including compromised WordPress sites. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement, common in phishing or scam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 https://wastran.ru/uplcv?utm_term=gong+yoo+movies+and+tv+shows PDF link annotation
    • http://humanlitech.com/files/files/mesuw.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/rozuvagenadubusolale.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/65581415389.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/413081297637cc4b2c640c8019da671c/17676806113.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/46876384588.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/8ahesvrme9kss008aftbm95qis/xunipipinagujoje.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/93826878825.pdfIn PDF document text
    • http://nature-revive.org/files/file/difal.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf0fbc0b14---9566106510.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/e9447f295a70f48b91db24b4badfee7e/dogesone.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/25279873927.pdfIn PDF document text
    • http://zatexpress.com//upload/userfiles/files/worutijanurugijigegasepi.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/12449317744.pdfIn PDF document text
    • http://fizjoactiv.eu/Upload/file/masosaselozorexi.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/d108e81174fd5b9b4edc1eb643b47cb6/sobekolusiwopowiwefax.pdfIn PDF document text
    • http://norrlandet.se/userfiles/file/vosigaweguzufito.pdfIn PDF document text
    • http://www.toptehnik.si/images/vomagawani.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/kuronegadexavevuwubagit.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/sapizozuru.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/9kfrvcbp9om90tfrknn3o8i7sj/fufudozinuwo.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/xudododexi.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/suruxatijima.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c7c82d963---zopulekiwomazasirojoxag.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/17731778085.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/lenaxulube.pdfIn PDF document text
    • http://altinay-law.com/images/file/sekelida.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/tutefuxaxugika.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_off0000d199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD199 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AB 19900 bytes
SHA-256: 14295801f47dbd10a3471e6d38e671b2f300400818e1cd4457b4b78bb9dd8a9b
font_02_sfnt_off00011dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCE 10852 bytes
SHA-256: c0bae201364b50a8b8ce490daf01dae397dff263f7746314e20d0350143a0283

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