Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2006f47b6c4d452…

MALICIOUS

PDF

93.2 KB Created: 2021-06-29 00:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4e94511705415f67488bc3d6d29926fc SHA-1: 4b7d35d3412bca122c8db99562db3f830b349287 SHA-256: d2006f47b6c4d452ae4c19490078295327d6b9a5d08d798a777d2e488a204e61
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised WordPress sites, suggesting an attempt to lure users to malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://archism.ru/uplcv?utm_term=prince+philip+and+princess+cecilie
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/5552faed54c7136718f001a9159721d4/4557868585.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b53209502bf---65611053996.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160baae76b5652---32850331090.pdf
    • http://urgentcarepb.net/userfiles/file/pitimogifo.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/35b85747ae5c4a857781f68f98dbcc2e/wipixaxavo.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87255d1a86---56908877254.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609860563e26b---zixopurawutif.pdf
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/wajezexo.pdf
    • http://doo-san.com/userfiles/file/20210508193407.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070ec3a2c3a0---16934062029.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/b371cca2ea83b7d364a24d26623db185/76363715915.pdf
    • http://aldara-latinoamerica.com/userfiles/file/46615116197.pdf
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607749e89e6a4---ludapepagezevexafewime.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4m45hqco3tpipk40fv6nscj553/rivajilutu.pdf
    • https://fizjolech.pl/userfiles/file/mitekupug.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/bfa03f23314df86ea80f2e9a9abbb781/43467557790.pdf
    • http://jonkmp.nl/img/cms/file/mesiju.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/15ea11f38afef9a4ed4f29a1a425f481/gaxoperutufun.pdf
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/fojirudabanoxevagokadip.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/njn91jg3bk0a5fd6m7uq5mlgik/dodurirakubirosanumizatu.pdf
    • http://usmleworkout.com/files/file/petor.pdf
    • http://ztkammer.at/uploads/file/44456399009.pdf
    • http://jorkurojus.com/userfiles/file/14195544815.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/69037301027.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed0a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED0A 16792 bytes
font_01_sfnt_off0001051b.bin
5f2f95fdf9df92631ebb58d0a7b387aeef8e2b3887772b3f0f959d31cfc572dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x1051B 17552 bytes
font_02_sfnt_off00011fb2.bin
17f8ce94bea22ee81d436b51a848a1571e9e79ea92442a7020875e9bca8734c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB2 10396 bytes
font_03_sfnt_off00013703.bin
274731f9625f84a26e08568491dc131c9241ee5c1c7668ea474c18fa563bf9f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x13703 18784 bytes