Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e24bbc51c0dfa47…

MALICIOUS

PDF

84.3 KB Created: 2021-09-23 16:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a5191d748baeed2c8f565a6392b4dfad SHA-1: f9a7de78f1a2b3054bfc1b4b6f505fc047128ccb SHA-256: 1e24bbc51c0dfa4736c032a151544d7a05418c7a00febd3b4f24efcc150df934
156 Risk Score

Malware Insights

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

The PDF 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, likely to lure users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://ketchas.ru/uplcv?utm_term=demon+slayer+kimetsu+no+yaiba+the+movie+mugen+train+full+movie+streaming+online+free PDF link annotation
    • http://khachsansapa.vn/webroot/img/files/82241230393.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/67b805728bff38e2236e7754c42beda8/kulonuxenamizedinewi.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b815345ce1---wubegizijujegagedibaluxe.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/2888db2ff88bf6655089ef6fd5a6d737/vegukola.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/dizozezilesenubovebime.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/91006074703.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/jobufiwigapizobusugowotur.pdfIn PDF document text
    • http://dejede.com/userfiles/file/kabapuliluluzowonemew.pdfIn PDF document text
    • http://yugreat.com/filespath/files/20210917103222.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///sidepesitowisuxux.pdfIn PDF document text
    • https://karthikaspices.com/uploads/file/tifule.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/xomofovusutu.pdfIn PDF document text
    • https://urology-andrology.com/userfiles/file/67900233374.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23144548622.pdfIn PDF document text
    • https://nusantarabet4d1.com/contents/files/mimuzawobesek.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16144da04d3739---94385798918.pdfIn PDF document text
    • http://dodogs.ru/sites/default/files/file/30895816869.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/1461103446.pdfIn PDF document text
    • http://vincentianssjp.com/userfiles/file/bivabubekefizenofimosural.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/xuximibadukuxirux.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/fituk.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210913_130536_6911.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/33099243466.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_off0000dccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCF 18944 bytes
SHA-256: 343609e235ddc513422b3c0a6d7ce487164a85a6f9aec50cbe11c85109fdbaea
font_01_sfnt_off00010e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AA 11172 bytes
SHA-256: 1909dc8a8bb070d3516f9d2ef4e5168ce4e4dcf877bcc488f166ea5ddc820a21