Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe0beef0541a5db…

MALICIOUS

PDF

76.2 KB Created: 2021-06-28 19:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba08a3fe5d8d669fcf8a976e7ea3675f SHA-1: 62a17d70a3a9c1c02e671c910536bac1bf303e8c SHA-256: 9fe0beef0541a5dbf9c94d6e89520258861a38412a15969f12985ab41b00466b
96 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content. The ML classifier strongly indicated maliciousness, and heuristics identified the PDF as a link farm on disposable hosting. The primary goal appears to be redirecting users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/34baf452dba847fc6f6394fa98f1a360/mirepuvoziwagif.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d46561d559---2401474868.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c845a10d1d---54791386144.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c74168deb14---nonoworabujejip.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849535c05ac---povulu.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/koq85v1fblq57i23bct626a600/vojedopiladudatusavulo.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160d5bb20cd0a7---kefopadik.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce54baa9da---30074255805.pdf
    • https://afayl.com/userfiles/file/53595051509.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae404d56e89---80577302257.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/2a18c428b09f036e0aa30023a3f026b9/57366361531.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/38521bb4491a5f7d677af283da02f0f4/vakizanejexuges.pdf
    • https://3drm.bg/uploads/pictures/files/risafutikopulofimafodolox.pdf
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/rakifij.pdf
    • https://mps-india.com/userfiles/files/80000731171.pdf
    • http://www.sport-konyv.hu/userfiles/file/fukawokatizev.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16080f69eaaa39---86891986914.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944a4c1ff9d---jaxotepalurenolifukosido.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/27oubt7erfgcgpkuve166j2275/38409144131.pdf
    • http://ural-resyrs.ru/data/file/4657544401.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/a822e4f86957f178e6581a9a5ac8a84d/30377878534.pdf
    • https://arte-salon.ru/upload_picture/kapodonatemodiwozap.pdf
    • http://perchegouet.com/ckfinder/userfiles/files/dobagezupabidobenotodefe.pdf
    • http://ciccioinpentola.com/userfiles/files/98479735273.pdf
    • https://myphi.biz/nbloom/fckuploads/file/talinekerijupopum.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=variables+in+science+worksheet+with+answers
    • 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_off0000c808.bin
14a36d6a067c729a5ab56c4848da7fdf9bd94c8e42e29e423831a20ca462cf72
pdf-font-stream PDF embedded font (sfnt) at offset 0xC808 16316 bytes
font_01_sfnt_off0000f285.bin
3dbcaf9fb7da63adba0aafde4350255dd56857921ffaaaacf52fbdbf62a42c0d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF285 10612 bytes
font_02_sfnt_off00010ad1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD1 16792 bytes