Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78ca16aec7a97c8…

MALICIOUS

PDF

67.5 KB Created: 2021-10-01 00:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c60469956fba92f49fa41954ef5d2af3 SHA-1: 454ad39f82c49daa8dc75994f955e184122be8b1 SHA-256: e78ca16aec7a97c8b835b2996847285b4680b1ebe0c0b5bdb8b346f910268703
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, typical of a screenshot designed to conceal clickable links. The numerous embedded URLs point to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites for credential harvesting or further payload delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://queure.ru/uplcv?utm_term=ros+cheat+online PDF link annotation
    • https://eghamatsafar.ir/basefile/eghamatsafar/files/10315624098.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/99968516280.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/74651772381.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137da944867e---62779590360.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/voligi.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/gubegolivorodoxu.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/d647754a7e0559c812ffbe2f473992eb/kokataxugusenogarovamaxim.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/mosomas.pdfIn PDF document text
    • http://splogservice.ru/content/files/kufumesodek.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/faniketakinegokib.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/renorusafe.pdfIn PDF document text
    • http://flixgolf.com/ckeditor/ckfinder/userfiles/files/kagibe.pdfIn PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/koreroviketol.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/rutufibazuwozapavorap.pdfIn PDF document text
    • http://planetamama.ru/files/file/62423413160.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f462ed714---mipenisusogakojefo.pdfIn PDF document text
    • http://yuha.be/_files/file/lefanaz.pdfIn PDF document text
    • https://medbioplast.com/klucharnet/images/file/83335896841.pdfIn PDF document text
    • http://newbusan.net/FileData/ckfinder/files/20210904_C662D2AB40FF9616.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/8283130949.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/doxogituma.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/pezedipufapilepazavow.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_off0000ac06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41D 10272 bytes
SHA-256: f73e8f9033923a8e3f4841d68c8d4fecd2fde440220a3cc2df3c05cb4312492a
font_02_sfnt_off0000db29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB29 14140 bytes
SHA-256: d3385cbe4a63915243f5ae5a9c39bdb7a7acd39cb5f8fdd01cada2764fc24040

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