Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea29d1e6e541966f…

MALICIOUS

PDF

109.0 KB Created: 2021-07-21 20:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 516a5a57a806b59c355657ea51cba493 SHA-1: 55a7acb5b228920a7210240bd79704446e4a4ff6 SHA-256: ea29d1e6e541966f3dd890743eb5a41f7445ef9acfa20eab289ce01fd2b84aa7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The document body is unreadable, but the heuristics and URLs suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f94edf794---31236074519.pdf In PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad97a56408---71270185107.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/thbk7cp7raslppen9rmcfc1ilb/rigijovumud.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16076d9bb99c5b---loragowodo.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/20865524425.pdfIn PDF document text
    • http://dnepropress.net/files/file/57682752640.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/kakifaxinaweje.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e54d1d888a---8020848897.pdfIn PDF document text
    • https://advertisementnepal.com/ckfinder/userfiles/files/71125882232.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/a61a0cdfecc0892703a49bc493ed9c27/62906693512.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/gekowomiwilabukamina.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/e137895030096ab780d643dc976b00fa/ripojeka.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/a9kf91fnv3crnimutpskddhf60/fofumerefofuzunezidide.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/fogupenorijaxateneze.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/23816816568.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ams5ce6o779tni7bp78qoroaq6/fakipevoxavawukadativenar.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210606110327.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fae9e68e6---sefogoliwipetiminazogu.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16078e0a0b9de7---6255084453.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/m945adg8jtqc3r967l7g0ej9bu/43763050960.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/36299631783.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/e6fee766f57a2901f4645e7b6718fda6/65914717142.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/0391a099d460e847a5f37072e5e42113/renevigoka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=medial+head+workoutsPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000148c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148C9 10512 bytes
SHA-256: aecc32a62c0a6d60175a19ddd4357009bb0662f2e3d52984c218407073cb2427
font_01_sfnt_off000160ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160EA 17072 bytes
SHA-256: 8056b97c2c322df342a86b05abc1f9c2758fe4f3c7beac926aa6e597114fed3f
font_02_sfnt_off00018d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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