Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e68d9a979a6afe5…

MALICIOUS

PDF

82.1 KB Created: 2021-09-01 16:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c8ad1c91824e05a92709c8f084da1579 SHA-1: 2783992829bc779bd3ab53240589e346dbd23ad2 SHA-256: 2e68d9a979a6afe5a21e90e23f7fcbd8a0e01aecf6c4fb5eb2cff199769b50ac
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs, while numerous, do not appear to contain executable content directly within the PDF.

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 http://yishiweb.com/upfiles/files/20210707_174906.pdf In PDF document text
    • http://musiclivemarsala.com/userfiles/files/zenutomojituxesolagofivom.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/95827745908.pdfIn PDF document text
    • http://awards.nl/img/cms/file/lewipota.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/turumejogavinov.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/6001007014.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/00549292085dfc053d3170cc54ad0308/vunebimuzejofefixalazexas.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/26834522497.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/resib.pdfIn PDF document text
    • https://jager-ig.tw/up_photo/file/39147291660.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/zowuluxomomuzowadumudogu.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/7jl4eoluvqu8tfalhm4cne8th6/muvemibebaxekuxifav.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/wijadikiwenoz.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/3105879856.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16092973ee1d60---70498470179.pdfIn PDF document text
    • http://skinanniversarymall.com/userfiles/file/mefegolijesofajirun.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/zurupavizuxepusose.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/b0e5f9c6420a5e4e3feafded55ea34ee/sitonanikaberobemoxirel.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d422a67034d---tixadaradinozepil.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f429db5cfe5---mewexisodubijebabuzisiw.pdfIn PDF document text
    • http://nuk-amro.de/userfiles/file/dojonojipurubelob.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607470109193b---59091635435.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/42288831368.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=brandon+routh+legends+of+tomorrow+supermanPDF 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_off0000d911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD911 11092 bytes
SHA-256: 90c697205127ed4d827af2efcbf2498b49d38c6804881c673975fa0b8b910401
font_01_sfnt_off0000f29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29F 18816 bytes
SHA-256: c869ba94eb8049910539d649bd07830f77d3263cac1d847e702740e6a4432283
font_02_sfnt_off00012373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12373 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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