Malicious PDF — malware analysis report

Static analysis result for SHA-256 114bb89fdabbd09e…

MALICIOUS

PDF

84.7 KB Created: 2021-09-06 13:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 066304599f9122aa4957bdf69641510f SHA-1: 5b1e212a19eeee5197e4d0478b1776a892e935a5 SHA-256: 114bb89fdabbd09eff8433bc44a76fea2a38f1c2c6efeedb68ff63806cb7925e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to domains that appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/9mqng7jjm0hurgcn2uc4dffdmb/kerafobazinereta.pdf In PDF document text
    • http://bogieclassof67.com/clients/71235/File/nolifuli.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/r499fh2146t3jo6srke8iktl13/benakisep.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/folopuguvosidebunaga.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/5810c3ac07c6519b7a4a9a8dc042bc9e/mibizapagazamob.pdfIn PDF document text
    • https://pasarangroup2.com/contents//files/biwusorejegesav.pdfIn PDF document text
    • http://thucancakoihikari.com/luutru/files/kizasapaja.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160da140406c71---59663374790.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/61257190750.pdfIn PDF document text
    • http://whuntex.info/userfiles/file/xiwomutanuroveretugixo.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/3269f57d6cb414b58182dabc3d38c6ac/9368237161.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/33727719425.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/9cbadc1bc5ff5ceea37a79652832568d/24938194601.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f3d8248d1cd---gamevopepewad.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/of60al8h49ubuamcddkfe9brfc/pitamunajewoba.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/c9482cc12abcb2ff193d1fcef71c8f3d/18569267998.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/kepukujukamunuwevujozitak.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/33415100245.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612638086cff2---23471698802.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/k68gi5sh36pb90uh6eohjgbv36/megepifiwoxuxaruven.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/19393178561.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/rizuvu.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/75246784522.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c86e9d5584c---polekuvumo.pdfIn PDF document text
    • http://augsburger-dartliga.de/uploads/file/55987835472.pdfIn PDF document text
    • http://runo34.ru/attachments/file/kobujaris.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=libro+completo+de+persepolis+pdfPDF 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_off0000e288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE288 19072 bytes
SHA-256: 8a7c06388a77c6b79dd192670914e94b41fe9adcbc707572ef840c7174f2eb90
font_01_sfnt_off00011314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11314 10612 bytes
SHA-256: 266b800c00b712f1a12faf9ccf5f3ac374f4de63c4394c951c3a9019de42d932
font_02_sfnt_off00012b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1