Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced144cab0f07de7…

MALICIOUS

PDF

83.9 KB Created: 2021-06-26 05:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5b46bebcd30b9417a8c86ed4b4ee7ca SHA-1: bb6a8c5ddc50fd9db4a7b4ffa7795466ad7e03f3 SHA-256: ced144cab0f07de7de6b5c88f6a9fe375a135fbac7c78c2eb63738ea9a44864d
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082c9a83656a---98333438103.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/08a72ab53893b16273244d8f56a556af/90587920103.pdf
    • http://epoxidice.ro/mm/file/76172606905.pdf
    • http://viviapalermo.com/userfiles/files/pusubarawab.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/nejuhn67e98prhd0sqltoqdevd/44203238957.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cb9197b5561---85784565329.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083006931aca---kejinobuvorenasew.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9921ed2dc---12524819774.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2720608f4---88592268181.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/4222a75f76c263b5e204ac10b1a401a8/navisitakebuwa.pdf
    • https://nepalipublisher.com/ckfinder/userfiles/files/bepomotukuxasabezajebu.pdf
    • http://curry-box-deluxe.de/userfiles/file/beveroviw.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/6rjpptv3rp80njh0rtfdd8njt0/35975170211.pdf
    • http://aplus.to/userfiles/file/54452574635.pdf
    • http://susutour.com/userfile/file/fizebetekelud.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607084280542f---zifabavofazaxikevela.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b00094765ef---demos.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/6vf8jvv6j99ce90timp2ml4f74/43059423400.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/811446822cda93385e466fc6bf682e56/49104035395.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/28aff455f6443bd31a3260bb11428b22/putawilifezekusolab.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/992e72e9a2b4abd509b3ca8afcf8e915/vogavoravezaxafusowifan.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087cbd99bbb5---vadisazagob.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c19b2e5f5ca---56725004969.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=triangle+sign+meaning
    • 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_off0000e86e.bin
aaf25f3d03db1c0c1825ba7bc8e60dbd3dccf95ab4928bd12c3c686612f71957
pdf-font-stream PDF embedded font (sfnt) at offset 0xE86E 16764 bytes
font_01_sfnt_off000113e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x113E7 16792 bytes
font_02_sfnt_off00012bfe.bin
6cac68efc6f245a3b41209f2dd3c3e518248103b517d3fe698213557c18b78d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFE 10196 bytes