Malicious PDF — malware analysis report

Static analysis result for SHA-256 098ad04b70e885aa…

MALICIOUS

PDF

98.1 KB Created: 2021-07-06 04:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1376c7f7cff95c70e7483fdb19891db6 SHA-1: d1cbd11a15f159a2da6d511f925f4c83d4f33f3b SHA-256: 098ad04b70e885aa9fbe2e2714ca0e3ea88e0c7104d9e9be9cd3b5a03acc0a3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the structure and URL patterns are consistent with a phishing lure or a downloader for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3c6e5b6d6---12768633600.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/2i9bvrhgcpku2o6ej2q9qipdlh/zogumogapuxiw.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a13df33838c---jolin.pdf
    • http://studiopol.it/userfiles/files/38670167053.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a33f1ff1a6d---68101306186.pdf
    • http://talleresjpg.es/img/file/1258603331.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d70786cdbe4---95773027363.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160984de87e550---bolifafolamuvipag.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/1453l4vaaoumv9sh882tj97ih7/87172936226.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/19up5ruie9aleh5chro9cfjhd9/38584271563.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/dc37c37cbe0c078a02b3a671f946a145/wegujaw.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/4vuljr178n86t3gjr5aqu2iei0/23959970183.pdf
    • https://acrgroup.nl/userfiles/file/gifomafovekakekebatudid.pdf
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/zabaxubotof.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/1764f1c89012137bb81dac868a5879ce/selosabesanaw.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/durfp1trjmt1i4ud043905hid1/wirubexatupogowivij.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/3m2eu58kvcbe95gmrogtmj0b0u/58582734998.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a31d7c21ea2---8868950697.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/o7938me1aaibtbmfc9l617l0u7/wijilineragobuxesukiro.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606da4f711be6---razoxubajasubapu.pdf
    • http://albino-pitti.com/pub_img/file/wudegol.pdf
    • https://mehreganimaging.ir/images/upload/files/vujobokuwivor.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/00d9d00bdec6fae0793cfda5fd7d949a/81036304019.pdf
    • https://valenciamaids.com/userfiles/files/mokifazu.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f66c742bc---jumobogokirutoloju.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/8ojm3a1rii1rq72pb2f4eei6pk/viwotugetudukixokawowam.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=infographic+ppt+free+template
    • 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_off00012001.bin
809fd63a864d65681686416497db1a64e5ac1e870698ddc1baaf2b83cc81751d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12001 16516 bytes
font_01_sfnt_off00014ad5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD5 16792 bytes
font_02_sfnt_off000162ec.bin
53484298f7261979f9b76241d80d309e673829e6b2f151065f938719400cb353
pdf-font-stream PDF embedded font (sfnt) at offset 0x162EC 10708 bytes