Malicious PDF — malware analysis report

Static analysis result for SHA-256 4edaba0b0cad503d…

MALICIOUS

PDF

84.4 KB Created: 2021-09-12 11:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 932454d73ee874968ff9f6dfedfdba9c SHA-1: b1febf7e3bcf5429c540d11a93493343cdf80ab1 SHA-256: 4edaba0b0cad503d859ca7df757ac9045fb47b3ad046c47030920eb5d35627db
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs pointing to potentially malicious domains, and the PDF structure suggests it functions as a link farm. While no scripts were explicitly extracted, the presence of external URIs and the overall detection profile indicate an intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://benetalent.com/upload/files/50107952076.pdf In PDF document text
    • https://xn--80ag1a2a.xn--p1ai/files/file/fofewi.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/tipibifoxadi.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/rajunugi.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/13041484234.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/62591810328.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/denufixuzutugopaxila.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/sufajenusumarapojabizome.pdfIn PDF document text
    • http://tucholainfo.pl/userfiles/file/nakutelegakurasoguzelipob.pdfIn PDF document text
    • https://testgit.begurholidays.com/uploads/userfiles/files/sefejoxe.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/161344702dc7a9---zulub.pdfIn PDF document text
    • http://damutech.kz/upload/2021/09files/210908045352614185wkoy3.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/11364595460.pdfIn PDF document text
    • http://banquat.com/userfiles/files/62729369786.pdfIn PDF document text
    • http://espokebar.com/uploads/files/27542646479.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/zuzebatewaxatut.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/dumusakuwuguvexupusa.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7ae82d683---tiluduwakojoka.pdfIn PDF document text
    • https://gestionarival.com/userfiles/file/92753236120.pdfIn PDF document text
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/vurufupiv.pdfIn PDF document text
    • https://lecormier-menuiserie.com/www/upload/files/77582887506.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138213f806f2---77123688781.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/72283313126.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+restore+permanently+deleted+photos+on+androidPDF 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_off0000e1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D9 19212 bytes
SHA-256: 921add51ec4840d1d2d41ed94b18ed4fbbfae5f2f7308b75fb6163e4a8e64461
font_01_sfnt_off00011310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11310 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B27 10848 bytes
SHA-256: f6d2d0c2efd58f284df4884de5e53ecbec828c9b1c2e1faef9677fd29cde9071

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