Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0eebd9e7ed1632…

MALICIOUS

PDF

80.8 KB Created: 2021-09-16 20:37:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ac453a929d0dca2e814849285083b379 SHA-1: 3cff9debe832f21ee27c6484ae118d552a0216b5 SHA-256: 2d0eebd9e7ed1632df465bad9c0c19aee4278122401489de0021f4a69cdb4298
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. The document body is heavily obfuscated and unreadable, providing no further context.

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://nomylo.ru/uplcv?utm_term=filmorago+pro+premium+apk PDF link annotation
    • http://oasishs.com/uploads/files/20210909_091334.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/xusijevire.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/bitudasapokeka.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/xumid.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1614300e7415c2---36220799951.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/tovox.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/tifav.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/vazitusibutesaxewazuma.pdfIn PDF document text
    • https://vieclamlaocai.vn/webroot/img/files/sejoda.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/161427e4d02d7e---forasubaxekujibuxovi.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/zivebil.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109022038425692.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/garilevagokotinatetife.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/2c2020bf2ea87ad7181035059b513877/pumobunusawoja.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/sivavimifet.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/wowaronama.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/27542477587.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/wawidivuresedixatafagumuf.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/1758200226.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/sumokalewomabomopekowo.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/lepuruvubizisem.pdfIn PDF document text
    • http://floramarble.com/uploads/72268991333.pdfIn PDF document text
    • http://parfumland.sk/upl/mirazedos.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_off0000d79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB0 17912 bytes
SHA-256: bf450dfe8c5a0a7f966c9c8c32b93c25aea1c3a9ce8d7f3614ca6f01c281b5a1
font_02_sfnt_off00011e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E28 10396 bytes
SHA-256: 669b82c33bf1f6ecd4b2ed71f57680f425c261d275ad9a9342a4ade62ec09355