Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad0669c04c7825f…

MALICIOUS

PDF

85.8 KB Created: 2021-08-23 15:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fc552e827175e430213be6d79f8af5cf SHA-1: b462334ebfe19c6853b59044bd58edce55d62eb8 SHA-256: bad0669c04c7825f105e0c61dbf67499000c9df8760989dc2c4c11269fc51748
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised CMS uploads, suggesting it is used to distribute a payload or redirect users to malicious sites. The presence of PDF-specific heuristics and the nature of the URLs strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608429780da23---7280411062.pdf In PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1ba4ce79f---86492663413.pdfIn PDF document text
    • https://xn--mgbaf4adbs1bd2i.net/upload/ckfinder/files/9414953713.pdfIn PDF document text
    • http://www.americaninvest.net/upls/files/faxenokesin.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/88958251380.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/45362711245.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/4919368066.pdfIn PDF document text
    • http://7tec.ru/userfiles/files/misideruzidag.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a039012bf70---60265374513.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/62133037641.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210521102654.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c33e85e624c---dudene.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/bavamawiw.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160907912d727a---mibixaxepavopit.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/b4de9c9127e97ab5a902c3ebab4c64aa/legarerepetuxasomaken.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160866f430ba17---ditipemaxobakuwubaxaf.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/d2cduc68v0ocei922mg7mng2g9/wefofanitejasuwivezenik.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d73c91e0c2---rolop.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/bc5020ea341448a465b4b5ddbbca1e3c/93847159273.pdfIn PDF document text
    • https://angkaganjil.com/contents/files/tukaji.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/27540122127.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/mabero.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/zebuvaforemaza.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/25831335969.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+can+i+mass+unfollow+on+instagramPDF 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_off0000e919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE919 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001012b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012B 17812 bytes
SHA-256: c2ec75c403b0cac3132ea8cf2aae61e30ec53ef4e385f64775e95116845cf8a7
font_02_sfnt_off00012fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB8 10724 bytes
SHA-256: d298f3480d8598d962dcf2048916686cb40906223c992071c7f17b69aa4da1de