Malicious PDF — malware analysis report

Static analysis result for SHA-256 adbca004498c5519…

MALICIOUS

PDF

86.2 KB Created: 2021-06-27 01:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55b1fceb351d494cdd2663ab6a73745b SHA-1: 2c4b4c9be85169ff0efefa8f97ea58efab3e5156 SHA-256: adbca004498c55194ab8286ead428882284cae3fcdf601c93e3dcf73f7d3a40b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also features a link farm pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915af27af8b---semuri.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/9a4oj87ujjb6asao5nv46pfs52/22347344427.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09e8ae4d50---dezigez.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/j64fmeemcb5dchq8dennh7jp55/wobidadobituj.pdf
    • https://clinic4lab.com/upload/ckfinder_temp/files/20210623044144.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c990169db---5326802443.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd645dcf285---gimis.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c68e771c7c0---72047578218.pdf
    • https://ferropula.hr/files/fitomotadixupon.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a596ba272---30911984489.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf6b25cdc2---16360381795.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be43120deb5---19323128020.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/0eaf14cb52becb1446bd410b1bd96dab/xetowijepewone.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/88031af823a9f38e69ba25a429528d2c/17656886401.pdf
    • http://malbreil.com/userfiles/file/kalexugiripetezepavora.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/fujq1i8tu9577fq0hsfrar42k6/dorivaz.pdf
    • http://tilestone-pools.com/i/File/wexadax.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/887882eac3b974f6669abd8e1adc7eea/mutopoxupuxuwizezopakogu.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2bbf0f61b---32761438398.pdf
    • http://perles-del-beya.com/userfiles/file/37473783581.pdf
    • https://alihuata.com/userfiles/file/panoxokifaba.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16081efbc3ad96---dorufigujokazoligugepita.pdf
    • http://technoauto.jp/js/upload/files/47849125974.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160758267e0090---42246030203.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eda5f5ed3c---96741869698.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ff586b011---firajiwibesamaxe.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=willie+nelson+johnny+cash+band
    • 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_off0000ed5a.bin
3db0d63d97504eab3099f5d988d50c7dc573f2e7325cc9c1bb1dea8bd221cf0e
pdf-font-stream PDF embedded font (sfnt) at offset 0xED5A 17364 bytes
font_01_sfnt_off00011ad9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD9 16792 bytes
font_02_sfnt_off000132f0.bin
781e38f3284fb9fa8066dc3062254dce04f72874b93d88ca2a76da478ebe8fd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132F0 10648 bytes