Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ceea2b2bb406d28…

MALICIOUS

PDF

82.3 KB Created: 2021-09-09 11:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ece39526aef1a932d0289912e95b70d6 SHA-1: 1375857714cb1d6c596798c9b3ceb24ea9b765fe SHA-256: 3ceea2b2bb406d284722738631fdf3bf265028d7890870d002b1fddf4ae9c230
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection as a phishing trojan. The document contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://theptaynam.vn/upload/files/94601235317.pdf In PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16137026ce2088---63817851907.pdfIn PDF document text
    • https://franchisebusinessadvisors.franchisebrokerwebsites.com/broker-site/files/files/rumugafodisogep.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/88028902883.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/62395970161.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/powulewibinafejojatog.pdfIn PDF document text
    • http://teakdeck.pl/files/file/95450686741.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/47510322830.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/gopaledog.pdfIn PDF document text
    • https://pensionradvanice.cz/res/file/deniwesurapuzimozo.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/26169475026.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/a11b5c36035de787db99abbd6ee12a2d/94159931104.pdfIn PDF document text
    • https://webmenuplus.com/images/file/36670016632.pdfIn PDF document text
    • http://solentpodiatry.com/jackvl940/web/content/images_uploaded/file/wubekol.pdfIn PDF document text
    • http://olympicthesportshop.in/uploads/zamixeriwarefonozudabowek.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/vesodijazadinavibajoziro.pdfIn PDF document text
    • http://www.omt.ntou.edu.tw/ckfinder/userfiles/files/15030293387.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/tedawavelizobotebokut.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/51929992634.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/161348afe9df4a---nibiwinajasofidola.pdfIn PDF document text
    • http://ergakiland.ru/files/files/16648397854.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/idgrkabpit95mijc0k6q8f5lm7/61033134835.pdfIn PDF document text
    • http://nagyberki.hu/sites/default/files/fck_uploads/file/32926578813.pdfIn PDF document text
    • https://botroul.be/uploads/lidezuzawux.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/12253668461.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/67861428404.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=divergent+free+book+online+pdfPDF 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_off0000deff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFF 16976 bytes
SHA-256: 3d535b7dd926bc57115c1a4e8cf8abaeb2f0910ac269e037cb986179ebcc54b4
font_01_sfnt_off00010b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12321 10640 bytes
SHA-256: 49d0cbebd04142130208f1b8d7e7e3d40c61f9e6e58c1faa1f3b36e5c710081e

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