Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ba29e9c5cb72d5…

MALICIOUS

PDF

84.6 KB Created: 2021-08-14 23:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 7a2ad91baa35bc260f04cca99a6866b9 SHA-1: 1fc8fb0bad66520c7174918201807b0789642252 SHA-256: d1ba29e9c5cb72d55e863f31a2c5d94eb9eb6bc65413ab1a3a87f430f2c3f452
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://pistant.ru/uplcv?utm_term=are+there+cheat+codes+for+nba+2k20 PDF link annotation
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072c516f1123---vamopamekegexumamikebuwas.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160726372db784---76253576595.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/53565372330.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/33732097231.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084601d2ace4---37951284918.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/a863f51b816a41fb4dee39760ed73440/fuvovaxatenijopimejatajer.pdfIn PDF document text
    • http://jaatkinson.com/userimages/pubowuwesakedadulifigevaz.pdfIn PDF document text
    • http://lucann.com/Upload/file/13939456916.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da7df37e0dd---91274501000.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/0pn8ef35jv5c1r9vc0ppov1boj/65589626522.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5109debe8b---3852071336.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/ef092fd000999c1a2c8d02d35a56dc7e/mixixinabemimadesike.pdfIn PDF document text
    • https://dejavuruse.com/userfiles/file/90880159715.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/67780243589.pdfIn PDF document text
    • https://actorconseil.com/files/file/zirewutaf.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7993d9b47f557e1616d6f4be94d7b30a/3134179269.pdfIn PDF document text
    • http://hncastlecable.com/d/files/43506492438.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/01048111c25b96f5ff6b0c84b7b441e6/45759096423.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/dffa3b80cb519ce52073ab1b66dc2153/kolikidojedeluxezinidumir.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/1ab352c1f175c6516f5b0fcb50502682/lubanedup.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1680785476---vudezaligikifupaj.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/wudax.pdfIn PDF document text
    • http://wjcopy.com/upload/files/69422541104.pdfIn PDF document text
    • 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_off0000e6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AC 17040 bytes
SHA-256: 2a03726c953ac42d5071156a1fc9f45a41a6e66fcf5ee5af23dfe9ca0918ab98
font_01_sfnt_off000112ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EF 10892 bytes
SHA-256: 8b88d234ef69fbf169fd2be0524e6e99308419cb2fb986514cc2e3f18612e3ad
font_02_sfnt_off00012c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1