Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe12ada31ad727df…

MALICIOUS

PDF

72.3 KB Created: 2021-09-28 06:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 06fef96d87bfb1a5ab7d5a50bbcf34c2 SHA-1: e86704135ace6510f9948df0ad2a26346dc34547 SHA-256: fe12ada31ad727dfac8c48e1b1c38ea710033f4e5dc4dfb76fbf49c527bc6e03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pistant.ru/uplcv?utm_term=redmi+note+pro+vs+redmi+note+9 PDF link annotation
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16150c0ffecb0d---46224495170.pdfIn PDF document text
    • http://brukbet.com/user_images/file/nopiforuze.pdfIn PDF document text
    • https://glearningsolutions.com/userfiles/files/xorozuraraxosabofefo.pdfIn PDF document text
    • http://aimic.com/userfiles/file/76119437446.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/50085925299.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/60330778454.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136596cb9899---mozed.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/garut.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/27732661321.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/tiwitipi.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/37907468500.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161350fea31ea2---tefovoxitavakebog.pdfIn PDF document text
    • http://groupelamiri.com/uploads/FCK_files/file/19685039183.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/malipubul.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/907f7c3a839e4119d864d214ff490376/zenivunivadidunopozepira.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bb8130e03---7500728324.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/pujibesosodavejalopivazi.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/36811793060.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1614a1eac3d0f6---jalok.pdfIn PDF document text
    • https://gilbertems.com/videos/file/sifiguro.pdfIn PDF document text
    • http://klenderbio.com/upload/files/navivo.pdfIn PDF document text
    • https://demideopool.ro/ckfinder/userfiles/files/85617482880.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/pafam.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_off0000b30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB30E 10624 bytes
SHA-256: 5caadc6b72f0735b96c8ff690df16cbfb03d34b69252bc10a9548e01ca1c3362
font_01_sfnt_off0000cb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36F 18688 bytes
SHA-256: 8f136457c062d104502a7ac001bc6c4db7f3f7cef43874b66d0f9ed6a1ba22d4