Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bf1c1c31bf2d5f1…

MALICIOUS

PDF

80.4 KB Created: 2021-07-25 08:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: aadd1b9c7cd88c9f68e6343fa3e9506c SHA-1: afb48d421d5fb67a8c991fd113930ceec52dc2ca SHA-256: 0bf1c1c31bf2d5f10709da3fe482e526e490fb88a5e49796650e5ffe3a632123
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8590

Heuristics 5

  • 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
  • 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 http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/2q0l4io7achbfmnmhrvcisici2/kigokapefogejadulopewuku.pdf In PDF document text
    • http://neonatal-surgery.ru/userfiles/files/99487970194.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/videfobaw.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769d4d4cd91---82404951051.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/zezabezunetigomatefix.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/66ab0ae6f48c80746452883035fe8b2f/xawefaxaxot.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/31464985584.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/u3l0k79nro9pidbvfo4j2vk6ro/vojake.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/b85f92094a7d3b9dbbcdf73fa81c520d/mumebawen.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/0bd2a26596dbe860445cb7b4db3a4a13/57350264299.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abeaef3e387---jorufeletiwanipatomuraju.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078282d966b4---92956828301.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/rawupezosizateto.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/79618057803.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/5270519d09e0f5455ace6f1f930d6458/tovevutofivogoguf.pdfIn PDF document text
    • http://starlightcelebrates.ca/clients/4/43/43e9139217482d7666ce300faf566241/File/dudijelagodigoririnix.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/juv4gq3jp7r5nkbhvses837nqg/86785688369.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/1c785e8e7f4914c42c41236f7c85e28a/xavodelofukebaje.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/beraxebekazevimix.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/jg612d0dchottoai6q3p70e4t6/bexulomasesefazimuzex.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/5890517498.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088c14c03803---vefilokelevarufusom.pdfIn PDF document text
    • https://raljob.com/userfiles/file/fumiwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=ubio+labs+power+bank+20000mahPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF225 17328 bytes
SHA-256: fd825c3ff5f945ccf06218f6fcacf23f5e65b2699bccfef257cba8d4b77eef56
font_01_sfnt_off00011fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE3 10984 bytes
SHA-256: e8f44018372735f9b45480fe231c68717ce98ff107b81d14bfc829be9143353d