Malicious PDF — malware analysis report

Static analysis result for SHA-256 18d889ece4a01ffb…

MALICIOUS

PDF

111.3 KB Created: 2021-07-13 03:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f9c986d6c1ff4fa5c51c2cc72ed79be9 SHA-1: 06183b94b6a0ac973b2438f18322497074689890 SHA-256: 18d889ece4a01ffbb0288264e95eee4816d116d1f027f9d37fa722f9260622ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous 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. No scripts were extracted, but the structure and URL patterns are indicative of a common lure for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=convert+1.5+miles+to+yards PDF link annotation
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/fudasarepusutowiwuv.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/13931338876.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1922d55707---27007308954.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/e04e4892dca7caab82a7f13c3a29fe6b/87507803514.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/zasozu.pdfIn PDF document text
    • http://isgsrl.it/images/file/72023200598.pdfIn PDF document text
    • http://anma.pl/anma_edytor/file/1827964694.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/60573681416.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90e086017---niraz.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/sudikipuwokonapo.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/fdcdb36cd6bc7a982652039adf4c3f46/53052786593.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/5jqe3f4l8qu775sh5f9g0gge1s/72991309181.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160802e7cf369b---77878251367.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/guwenov.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0fc6902e9---sijazavofi.pdfIn PDF document text
    • http://2440027.ru/upload/file/bepewafi.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/9881mhkneromfdtumofjjhoa04/44575100177.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/funigedumegutatamedipi.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/dbe0efe3748d5b306ca0cce72c44d61e/21052953638.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/93603116359.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/9l60ahin10g77kllofur3eu5cg/62562175258.pdfIn PDF document text
    • http://adveotec.com/img/file/95130828744.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/89d13d6239da625691dca9c1f96bbd39/telovetile.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5e45c04b4---38512625457.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_off000150b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150B3 17416 bytes
SHA-256: c96a2fc14fec0c4cd660edb14ba43d28a0847898cb996f165d6707149465df5b
font_01_sfnt_off00017e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19681 10872 bytes
SHA-256: 218585cb5559849f4727084b5c59f16a4f1fd7029421fde5ea7aec2899f387d3

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