Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad64c3d350172cd…

MALICIOUS

PDF

84.8 KB Created: 2021-06-28 13:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1a620cf0a74a5257f61dd36a7b00cb2f SHA-1: 98b54631a987867c9e0c7fcc3ca964cfe4bcd11a SHA-256: bad64c3d350172cd60aadb6e1e83f40ac9d5cb4faf1906ca67f1a3d51a5030b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. The document body is heavily obfuscated and unreadable, providing no direct clues about its specific purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://studio45.live/wp-content/plugins/super-forms/uploads/php/files/v09gg0tt5ij1c28g60ibkj55fn/66042003719.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ebb85ab54---tegamuliwoxaziz.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607e08a73d606---japumudarovabub.pdf
    • https://batikatravels.com/userfiles/file/84811828741.pdf
    • http://bonfiremadigan.com/uploads/fckeditor/file/24146269372.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1f3563122---xureweruloxijepirigojibin.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608612c6053a5---24730168451.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160d96a91b67aa---poxozes.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/e0a3pr0lbpsof9rtm45u85rvic/64724626313.pdf
    • http://jorkurojus.com/userfiles/file/18990475279.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/tcdkaju130hu4j1q8mlnibhu6t/wudodafi.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf059e5d08---361877772.pdf
    • https://pioneerlift.com/upfiles/editor/files/91160127505.pdf
    • http://cesishotel.lv/res/wysiwyg/file/muvupugu.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/v6de5fta0atmn2t11ta815k7bg/supinakufinirapax.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d59c1cc81---zapofe.pdf
    • http://opusincertum.it/userfiles/files/27288836509.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb7e5453c9---1245085076.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/f2821bd1e3b79089c46cee86407f7713/limikonafu.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/583f56e7f71053bb50007a9e7b88b158/misofevanososiwuxubovum.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707645c51ff---xabimalofosin.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=tubular+bind+off+for+double+knitting
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb66c6b1a75---lobawitinejapuj.pdf
    • 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_off0000e92c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE92C 16792 bytes
font_01_sfnt_off0001013e.bin
8b7665bf658c0c44a872da454722e773075856bc40f5cc2617774937cea2e960
pdf-font-stream PDF embedded font (sfnt) at offset 0x1013E 17148 bytes
font_02_sfnt_off00012e04.bin
b1df423de8a5c0c2583b48aece6c9cae6a7b4545c0ee92d67fe754cad81faf9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E04 10656 bytes