Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc0e8eb2e2a7518…

MALICIOUS

PDF

99.5 KB Created: 2021-07-03 07:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9e166ecd40362bf8842c7c983648a695 SHA-1: a9c4a0cc80718c32b94f6e692cb8e25a613251b0 SHA-256: 1cc0e8eb2e2a7518e8047b43a94e420e4d5d40256ab9ba5abbb26b52e814d099
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links pointing to compromised WordPress upload directories, suggesting it's part of a phishing or malware distribution campaign. The presence of external URIs and link farms on potentially compromised sites indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094428a73f0c---23967664694.pdf In PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/60e495b30865b6ecb6d164f3581e3535/34304858193.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b38a98ae9b0---22771217193.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/lametopuwinubar.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a01160a95---1122948573.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/96371428805.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/40276658503.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607509ae180f6---nemogetofivumelufi.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609470ec26482---58335102739.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/vuxul.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/likojib.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d8f1b9e48---91388108289.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a58e7947319---xewat.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a080a87b7a---wulekanenokezifisomuti.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160823c986214a---nogetijamurapijar.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cf4c4b9e620---59903726617.pdfIn PDF document text
    • https://irantruck.ir/data/file/foranedefawep.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a337c3ebbbd---mixanataloxubipaganed.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/90815729592.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/89753968547.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/eadfq0s5i80p7a2gjirhgmgnc3/47220268590.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/1fff99efff956b9211459d0a835777d5/36398437866.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/labixokujadedixopu.pdfIn PDF document text
    • https://proxus.nl/file/jipibawuxezugurufuka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=red+streak+infectionPDF 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_off00012242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12242 17588 bytes
SHA-256: 96cdbd3154be33f6e2f476c7a513f2b243694cfce446e961f898df7fb02425d9
font_01_sfnt_off0001508f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1508F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000168a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168A6 10560 bytes
SHA-256: 99ba3abb6024af4da700b4c37d8c229631b1beea0761d5cd54046658a4f1e053