Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed348326ce196e2…

MALICIOUS

PDF

82.1 KB Created: 2021-09-03 13:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 625726ff854b03ea2e3fc9261af4d047 SHA-1: 282ae44fa56cff1756ad7171e1ad84a46d18c7ff SHA-256: eed348326ce196e29a6623bca9da93775b7d072fa9262c3f6b3efc9dd0672c13
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS upload directories and disposable domains, a common tactic for distributing malicious content or conducting phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm on disposable hosting further supports a malicious purpose, likely to obscure the ultimate destination or to host secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://kpghomerepairs.com/uploads/image/files/konebowapebira.pdf In PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/fdv9tdjb7ans7b31nd4i1aceg8/813503187.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/mujisuxedewigegatomopujo.pdfIn PDF document text
    • http://lucann.com/Upload/file/pepuzirutadirudemebibak.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/zobokogelugawid.pdfIn PDF document text
    • https://shoreluxurylimos.com/userfiles/files/20612828741.pdfIn PDF document text
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/mesaterux.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130569e49e0e---movalok.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/mubalutil.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/ea07f3dbc53588119b1b497d83795456/farikuzuwebuw.pdfIn PDF document text
    • https://spacio.hk/attachment/file/67260421809.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/79edd7c0eb6888a482685a11f92a696b/vupuri.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/luzimesixinorule.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/dcd6436ef745489a5ac13548bfb5e580/vojidojoxekegu.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fae305a76e---55049347741.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/nemikasezedevaka.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8d232ce8b---binupiwimevesaludonuxut.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16073b56ee774c---79871278815.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/92559859115.pdfIn PDF document text
    • http://www.pataniforum.com/admin/jquery/ckfinder/userfiles/files/lesoxudodejetijarowabatok.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/23836673266.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3e89ae16d---68718509802.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/34315505155.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=free+point+of+view+worksheets+4th+gradePDF 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_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 16752 bytes
SHA-256: 69d595abe6c776b79ae8281833015f1e2dcdbcbc0f685c1b4413695e7915ece2
font_01_sfnt_off000109b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CD 11032 bytes
SHA-256: c57b6decddc15fb3badc6bd6249eecf6becf6f3ce150a036b5e5104e2c34c37c