Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be52c9abd7ffec0…

MALICIOUS

PDF

83.9 KB Created: 2021-09-11 21:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9ea27e893f7f8496eb025e9d386363ac SHA-1: 933cb9eb88d5f7169c6822d3b717a43247e5b640 SHA-256: 2be52c9abd7ffec0b2e3f1f02cbd85fcf9016057dcfcc67d4eb3cc0ff7c6fe7a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest a phishing or trojan payload is being distributed through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://sbmhavacilik.com/userfiles/file/pinovakinedilavakixiretag.pdf In PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161373079a1326---77297800380.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/89720162535.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/68523964518.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16133aa80679f5---kodarek.pdfIn PDF document text
    • http://goldmustang.com/files/files/bovuku.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/98839051848.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-2/20210902191609823875.pdfIn PDF document text
    • http://nikacarpet.nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/30208935607.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135cf6389a61---47267095344.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/39894865738.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/bejezuzab.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/63394760045.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/50617208839.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/zitizuzubilon.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/tofilekugejoseterifi.pdfIn PDF document text
    • https://wupaojichangjia.com/d/files/zonakodatabag.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/70393054677.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/kufiwepujejutazavaxunof.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/jepaz.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/94118018905.pdfIn PDF document text
    • http://studioiulianella.it/userfiles/files/bimerux.pdfIn PDF document text
    • https://floridahouselottery.com/test/userfiles/file/62875317437.pdfIn PDF document text
    • https://deycaterers.com/ckfinder/userfiles/files/45394360605.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=what+two+colors+make+purplePDF 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_off0000e1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C5 18228 bytes
SHA-256: 2e7622385f0bcd3cf171a11eabdb206e8c01727dc7aa0b9808a23e7e84abf241
font_01_sfnt_off000110d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D5 10712 bytes
SHA-256: 89738fb3a6cfa2dfead5a24e7836d6d9f28fbcddb7c7dd15acffc9d8c5b88e7d
font_02_sfnt_off0001299b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1