Malicious PDF — malware analysis report

Static analysis result for SHA-256 01732230449a930e…

MALICIOUS

PDF

88.0 KB Created: 2021-06-27 04:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 229112417eedb23961d0602d77186987 SHA-1: a95549c1d367f1af465af4cd546f06219ed3618d SHA-256: 01732230449a930e36f44014e299d083763b10d137342e06c9d4b4c7e15ba76e
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it's part of a link farm designed to distribute malicious files. The ML classifier strongly indicates maliciousness, and the PDF_RANDOM_URL_LINK heuristic further supports the distribution of potentially harmful content. No scripts were extracted, but the overall structure points to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/e38f5689ce5df03eeb31de88402fe148/56073150642.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92ef93df2---73856671459.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/sc9q4gvn85p7o9vcfkp7kn90i1/40947413798.pdf
    • https://edu-mate.kr/_UploadFile/Images/file/biwukuzozu.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/9f69f0f74938381cc9ecddd85f08e739/fujufil.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0cdfc3164---51946521610.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceec5b6312---detorabu.pdf
    • http://bienbao.net/uploads/files/30371017208.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608955958407b---39387750821.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c98c4bb2f26---26331947632.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b10697d14---29663114676.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/beda73e7bcd7a8ba03af93c505f30f04/fafolexiwiwafel.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7f7a50760---7199851722.pdf
    • http://developmentassociationofnagaland.org/nbloom/fckuploads/file/59679032469.pdf
    • http://rustproofingottawa.com/userfiles/file/6194176205.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a297c577fde---74193936991.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/7e2c376900d4afa1469a29b6bd563f3a/womoluvazixizoritumilifu.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a87b402d550---fixif.pdf
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/15a8bf23a47d388a29eaa306e1304afe/35124175081.pdf
    • http://morard-mcf.fr/data/Files/82298588147.pdf
    • http://cyuanmei.com/userfiles/file/bijirifu.pdf
    • http://www.contectrade.hu/fckfiles/file/54703240461.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866a058376e---xinodugisazenezakoku.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=download+drama+korea+miracle+in+cell+no+7
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f322.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF322 16792 bytes
font_01_sfnt_off00010b34.bin
d3f678797193130900f7d627b1339c86cd0723311b7ec7d623ec541f2a457308		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B34 18660 bytes
font_02_sfnt_off00013aed.bin
eced4399dfc15849dd53d21f6a936332753b7d7e5b67c9f595433617608c5445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AED 10496 bytes

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