Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea117c7496a3c4d0…

MALICIOUS

PDF

78.4 KB Created: 2021-09-14 09:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: faee12e1889199277c819ad3186b8079 SHA-1: 1885266f51433da2aa9e3accacb0a4e2a4500e84 SHA-256: ea117c7496a3c4d0185591b6af96221af2fb915f6527363166d87a40291df1fa
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several heuristics indicating it functions as a link farm. Some of these links point to compromised CMS uploads or disposable hosting, suggesting a malicious intent to lure users to potentially harmful sites. The ML classifier and ClamAV detection strongly indicate malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://puebloexec.com/userfiles/file/83680402387.pdf In PDF document text
    • http://area100impianti.it/userfiles/files/ratiginadenuputizugujefap.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/68470288710.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/58411564580.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/wogoni.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/20219602265133.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/99893957907.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131ad7521353---93552487337.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/xuwex.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090506031218.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/nuvilelimutufud.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/41991588558.pdfIn PDF document text
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/41694441568.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/gixulosali.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/04c2mq5cjovvurcue1frbppsi2/fukexuxe.pdfIn PDF document text
    • https://novitas.ro/files/3402939762.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/87226197129.pdfIn PDF document text
    • http://espaciocultivarte.com/ckfinder/userfiles/files/gumelexegapavebuka.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/35807373906.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a85359a5e4---12116511690.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/kazupokeri.pdfIn PDF document text
    • http://pk-rowery.pl/user_pict/file/87821292781.pdfIn PDF document text
    • https://coherence.cz/userfiles/file/vijizezaxonoladofulo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=fs+16+cheats+androidPDF 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_off0000d010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD010 17148 bytes
SHA-256: 94964100b5027e2522aa9a189cbd93b49d564ce005cde4583c27b99db776eec9
font_01_sfnt_off0000fc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC58 10620 bytes
SHA-256: 935ae3f30edcb466f4dedf2e5033a972468f0e301b3335be1c0b37dc6194741e
font_02_sfnt_off00011498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11498 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1