Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2efdf8cdfced8e…

MALICIOUS

PDF

87.3 KB Created: 2021-07-08 08:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 690a70e456c4a146f291669ef58d42d9 SHA-1: cd9b994e209bb1d4f437d8769a1eb17d3a8c39c8 SHA-256: 2d2efdf8cdfced8e3d0e45592d0bd35b8e27df5f31adde7c0d7f0f1a10ff1019
96 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised WordPress sites. The ML classifier strongly indicated maliciousness, and the link farm structure suggests an attempt to manipulate search engine results or distribute malicious files. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 5

  • 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 http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8708db1b83---nadonewixonu.pdf In PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab503a68bdf---48194362626.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/volitu.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b21b1da12f4---baxobuse.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/28479503399.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/6826424103.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16086cc5f5460e---mobobifonadukolajeje.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c91d19da6---18973275386.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c51a3115c---witetiku.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607be7d7ad1ad---33947632859.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fefea84b3d---putulenimod.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a646b1240eb---zazagigikobaronuzupesubon.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/xonupe.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/c0f0880967d31775f4e0aa17efbb2b53/71010381490.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a00e5dbc15d---33467137070.pdfIn PDF document text
    • http://www.motorradfreunde-toggenburg.ch/up/files/mebulejowokamajozudelena.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/nolugomepezinoxawal.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/sinajutulajajijuwelumun.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/363aab7512500154667daeeb3e14734a/mutititaraturerimile.pdfIn PDF document text
    • http://attlas.center/userfiles/file/babafalugukorositedigor.pdfIn PDF document text
    • http://club.topsage.com/forum-911-1.html���������������������������������������������������Mickey��Mouse��Clubhouse������������9��������In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=pluto%27s+best+oh+toodlesPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/8e87362ca56f4e5e320c6cfe0af28f69/60997185522.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/5c2bef8f066cd0180f8e7c29babccbe3/94916856838.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD01 10160 bytes
SHA-256: d4379a8a43d2729c98cd084f02447e7871c24cbf136952f7ce6d3c09f2ae4cfd
font_01_sfnt_off0000f3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F5 5784 bytes
SHA-256: 1aac4152e6f9af41d116ab441d157935575e0fc2d941665a024a74c3f6f43415
font_02_sfnt_off0001082f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12041 17324 bytes
SHA-256: 6c39a3505a0c151967618ec92392d80cd443e5d48fae956222f3d484b744f3db

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