Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00e628e6878b550…

MALICIOUS

PDF

80.5 KB Created: 2021-09-09 05:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3d0bc81ce05a6a24a65fc6c994866197 SHA-1: ceda4f6a74ac750872e1f763e73efcc03fd1c35a SHA-256: e00e628e6878b55051cbdf0266623853816860c1433e8cfeaa064b7d14b5bfe8
126 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to suspicious domains, and one heuristic specifically identified it as a link farm on disposable hosting. The PDF's structure and embedded content suggest it is intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b94b511eb---mewegirerovagetigep.pdf In PDF document text
    • http://studiopol.com/userfiles/files/47164789414.pdfIn PDF document text
    • https://derey.nl/app/webroot/files/userfiles/files/13970555010.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/48830204478.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/96782947592.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/31544887305.pdfIn PDF document text
    • http://oldadmin.k12cart.com/media/files/fetaximinuvabititakofege.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210907165556.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161377589a0a0c---roloz.pdfIn PDF document text
    • https://tempegaring.com/contents/files/kamevabeparagazetemu.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/83243213882.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/firofevezomezibupewazi.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/41292767025.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/26397506923.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/dedukakuvabamorosaje.pdfIn PDF document text
    • http://apsons.eu/files/file/42318558709.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/3390209637.pdfIn PDF document text
    • http://apartmany.cucoriedka.sk/data/files/47613272746.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/ladaraxozudebunak.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/ritixiteribemakugawamer.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/10374570096.pdfIn PDF document text
    • http://asclyziarskyklub.sk/userfiles/file/vuxexarogorativama.pdfIn PDF document text
    • http://hadt.vn/upload/files/32699358235.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210908185305.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=what+is+android+intelligence+servicePDF 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_off0000d408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD408 10708 bytes
SHA-256: 807c88016a56d9a0f4665d410741282acca80486bac74bffe8554595aae8ef1b
font_01_sfnt_off0000ec5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5C 18292 bytes
SHA-256: d5dd7d4ee6f3596203ad7944d95a3e1ff630d6fce91ad6a2094c698dd52155fe
font_02_sfnt_off00011c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1