Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ee1d46793805f2…

MALICIOUS

PDF

86.5 KB Created: 2021-07-07 06:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f95ee9ff8d59f95d7c744fb6f916bd50 SHA-1: 7665ac4e63861b0ecff3568717086f784ae2e6af SHA-256: d8ee1d46793805f2154bd1ea4b55e5f6cd38759887ad1df989a5909f6b430e31
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://chcial.ru/uplcv?utm_term=how+to+get+your+dog+to+heal PDF link annotation
    • http://darienhigh69.com/clients/866565/File/rigenib.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb8f923b24---66764040932.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/8a67d27f0e39bdae29abeb2b7587b864/4388430776.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f30b56748---12507870818.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160723f97036ae---fuxuzilegupi.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/go02uo7loaktjgksalq9oqv0o3/warufaja.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/72790659427.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/45asvvibsepdafpmmldu6ccrmi/78705149345.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a55829e7625---27872016040.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/fa85ce23d4af35d55d8ddd8c6f95b0f7/3733034812.pdfIn PDF document text
    • http://teresachild.com/upload/files/xatub.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/86727290447.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/50327460996.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/cbddcdbee8ccb7607516fb623f2f8507/fopefekeziriwobenozub.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/3842902775.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f17c1912b2---43966110941.pdfIn PDF document text
    • http://funperm.ru/content/file/75631174280.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8663c769cb---95244443818.pdfIn PDF document text
    • https://anjingliar.com/contents//files/91039311667.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be238b5c419---mugusazikedolebupunar.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/rojanezonawutilola.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/1i0vc71aq4rfm1rj1jusp7jan6/42613158775.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/55a408518c5af1dcf1de00b53e243ed8/827917920.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608841a022d21---27258352185.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/f24c72aae4d8b22dd28b280e552ede6c/8440955811.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_off0000f0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D8 17040 bytes
SHA-256: 91805e8dc1627ca3af507123c1328aa41a434ae2f1a668e17eb045b35ce332e0
font_01_sfnt_off00011cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13515 10452 bytes
SHA-256: 986db16eab1c6c6f4f72e3cc82830ed71830aa7efb145d82fb6f9eb876effd07