Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e9b6d53cf9ec8a…

MALICIOUS

PDF

74.8 KB Created: 2021-09-20 03:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7cebfeb63258b74bffa3c0438c7ed054 SHA-1: 4493fd640291c5a4338807fb6dab0e96b4ce9602 SHA-256: 96e9b6d53cf9ec8ad2bc6001739e82b5ce807936fdd8c0685e2a9d0eba046880
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. Heuristics indicate it functions as a link farm, with multiple embedded URLs pointing to various domains, some of which are hosted on compromised CMS upload storage. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the overall structure suggests an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://vespaclubcagliari.com/userfiles/file/17759696806.pdf In PDF document text
    • http://piotrkowska77.pl/zdjeciafile/pizadekarigimodatifom.pdfIn PDF document text
    • http://rotang.net/userfiles/file/64503633078.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/jugitefagu.pdfIn PDF document text
    • http://shanghaicruiseparty.com/uploads/file/finemazelebupabuzu.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/39515695116.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/rixanimoveruri.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1631357526.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/xepefixizikexamuri.pdfIn PDF document text
    • https://vwb.mrv-educationservices.com/content_file/files/53378347644.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/65197752126.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/84410728609.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/nakanerironewi.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16141aa618828a---razepoxomi.pdfIn PDF document text
    • https://ans5680.preneed91.com/upload/files/70016271699.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/kewijanumepiwexiwamo.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/161426dc36ff19---mipisobofigepojeva.pdfIn PDF document text
    • https://biocoils.com/img/file/85112058993.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/20065510377.pdfIn PDF document text
    • https://sergiomauri.com/images/file/90394061281.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/buxekixavonaw.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/17006753351.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/guwepevi.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/76473793399.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac4676c1bf---lofize.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=redmi+note+9+support+4k+videoPDF 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_off0000bdc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC0 10896 bytes
SHA-256: b41e4f5fefaf4119a86655bb85cf0ec41111898398cfa92a913a2dfa05d65564
font_01_sfnt_off0000d70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1F 17792 bytes
SHA-256: 3f73ab469350066f1f0b0148e2da817fd12d68ac556f5248fd5fba820b2f06be

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