Malicious PDF — malware analysis report

Static analysis result for SHA-256 3335cdb2b6b1bb7e…

MALICIOUS

PDF

86.0 KB Created: 2021-08-12 19:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: df9f0c5a21334313e08918909b048f27 SHA-1: 26418373f81d65e657f5943603384255274fc148 SHA-256: 3335cdb2b6b1bb7e4a3f620b1365a4d2220d3cf457150a4e6a9aa568bad6ab38
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content. The ClamAV detection 'Pdf.Phishing.Trojan' further supports a phishing or trojan distribution intent. Although no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a malicious document likely intended for initial access via phishing.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4874

Heuristics 5

  • 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
  • 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://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/672916c1e718db4a30724830acf1bb36/zinuxoxexunafixu.pdf In PDF document text
    • http://haworthclassof73.com/clients/73472/File/ziwuwizofo.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/bff35d10944aea6b35aadb7fc4a9e09e/1824641092.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e47a2103e8c---kenomibavusuzoros.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/lanaxeguz.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/sakir.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/81078175091.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf121eb21b0---davedex.pdfIn PDF document text
    • http://iwishop.hu/file/50129453301.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/26581049837.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610384d70bf6f---jepigog.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/gupetuvakizopezokoti.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/lemulolexivefoda.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/toxevokawemab.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5f1471d29---61735094625.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/11377097922.pdfIn PDF document text
    • https://vietspices.asia/uploads/files/14269054594.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/waxoj.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/180351453160c3cee61a1d3.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/wiwixapilasazup.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/ij8vi37j36fdehrqq79slnoumb/30735658722.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/5f3cdc485a684b2c63a4dd600a18e299/76668745300.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/40771666047.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c88e83bf27c---vujafekoxujere.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbfb746c55---nugegesipujagapixe.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/29c022226470a47de897c923a533949c/rorubaxotupajasiwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=eset+smart+security+9+license+key+2019+freePDF link annotation
    • 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_off0000fd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9E 16864 bytes
SHA-256: 79c11ac853838e170874994e3b2b574bbd72d8a2101757b845d8339b3a6aa37f
font_01_sfnt_off00012995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12995 11128 bytes
SHA-256: 69475da00516cd12bc46e43c69e62723b2c184259e514a040fe7cb77aeb69f34
font_02_sfnt_off000143b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1