Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19ff268aceaf704…

MALICIOUS

PDF

91.6 KB Created: 2021-07-01 22:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 38f74d30fba78214e7d3b04a15cd4503 SHA-1: db2040aebe6774ced66e619e39f36fd6e15b8d17 SHA-256: e19ff268aceaf70449e88067eea988490a29583f8c71f8afb4f4ad6dd84bbe9e
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, a common tactic for distributing phishing lures or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure and numerous embedded URLs suggest it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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 https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/rhvt0tpu34u09tm1tghjd0me52/28014802020.pdf In PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/87df71007846274f97ac98f3f2c4f51a/50316183874.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c6a531d88---38844571608.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/kelad.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a08b6335218---67879128615.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/45320940001.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e5e2f815f50006dbea9f30e1ddac030d/4258757836.pdfIn PDF document text
    • http://cwesp.biz/upload/file/livoduvafudixurese.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c937392bd7---lesoj.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/d1c8ff42e81ccc17424eecbcde9df32e/26887088122.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/e96f69eec02e61201d21c52bb55358be/17237629760.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/vubujixuderebijotukopi.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d1eae4bf8a2---19012077524.pdfIn PDF document text
    • https://www.epicbrands.co/wp-content/plugins/super-forms/uploads/php/files/17421422b26df2628a02aeef8a865415/zufovodo.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/dubosenepofurujofa.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d8030e127f4---49058274945.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a33afe09ea7c1f250d31a8a4b0c4ba76/zusonufed.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/94466595401.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/a88ce2a5c038e90c365d0d46cbc30b72/lifobuba.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/m37m29u3up1hprdgrm4rav88k2/jorebezisupubapowusam.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/77d1e6bc02b1b11b8b0ecb7801c6b162/55459357362.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607db08cb8153---danojuwa.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/xemewaze.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9d60c197d---kifadatazupimowe.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/45061193658.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/613d236c192355b7bf34dc058e9a0ef2/82607613033.pdfIn PDF document text
    • http://rc-modeller.se/images/file///zajetuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=relationship+between+velocity+and+wavelengthPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8F 11144 bytes
SHA-256: 7ac0415a82d1b73752ff48ffb8e0a7bc575e544068d54b37dc485d3f703f2b76
font_01_sfnt_off00010427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10427 16088 bytes
SHA-256: 450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c
font_02_sfnt_off00011958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11958 17704 bytes
SHA-256: d76d3e919fdee953d122f4104bfa88f0bae1e1f6fa6813903e474599528469c1
font_03_sfnt_off000147f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.