Malicious PDF — malware analysis report

Static analysis result for SHA-256 edde6cd2b86ac5ad…

MALICIOUS

PDF

110.6 KB Created: 2021-07-15 12:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 79e2e99f4afee4dcbda3ca8e98679dae SHA-1: ea3904112aff5e3c263c5787e847f5ce76ac9f69 SHA-256: edde6cd2b86ac5ade5e7db7f9911b546dbcbf9855c54bea94f8280597d9fac97
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV also identified it as malicious, likely a phishing or malware distribution lure. The document body was unreadable, but the presence of numerous external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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://coretry.ru/uplcv?utm_term=counselling+skills+for+managers+mba+notes+pdf PDF link annotation
    • http://orvosvalaszto.hu/uploads/files/suluzimimifobabovugojeke.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/40e6d1c47f0b49152730b9b7a21e4d47/lupiren.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/fojavizisejojelanejufuva.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607f027eee082---sevub.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/vanig.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/487edabab70abe94f32e08807ea7e7a3/zarirugasagofukikon.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df262c6f42---27189886341.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/131c3931242390f5ab96ee6d2f475aa6/74323781721.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088693813498---34532973628.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ad64b9ca868---zawigu.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/7fvt72stvlfu0t0c2q7i2r5k3g/xamisigorodoxanoramone.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/wuzujipawezas.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/fodator.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/pjf93pmku1se5jtrmbm8s64fk1/mudewafuj.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080e46188a0b---dakinawefusogafunofaf.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/95706776686.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c5ef7f89a---dawenesigevuxi.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/zirulet.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/4da21c5e8d48eb1df05e563bbbc4aa5e/78979727558.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/bh5qlveaabfa2beisnpshil1p7/foxowegigin.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9e30437b1---5590320569.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/61393800408.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/1124168400.pdfIn PDF document text
    • http://alltechsro.cz/files/jatoperenaresumodul.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a422c980804---94154177882.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000142f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B0B 11204 bytes
SHA-256: f0d11ac200142e8e260af17155c3f520cba54b18893ce18883034e2828836382
font_02_sfnt_off000174e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174E6 20792 bytes
SHA-256: 1fa291d19092e0b10324c77edf4a317ea3e00be59f58bb938c5963fbdb0ea256

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