Malicious PDF — malware analysis report

Static analysis result for SHA-256 2786e179ac5b9e16…

MALICIOUS

PDF

80.5 KB Created: 2021-06-09 18:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ea54788af25d1cf4aee0b5d11f8b8144 SHA-1: 96ded902fdf0ae1e6634f60f1d7e9900b2ce703e SHA-256: 2786e179ac5b9e162538a95e7af6e2327f442e6d7daf02f794793cff95807f83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm or phishing operation. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Gloud games hack apk download for android', indicating a lure for users seeking game cheats or hacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • 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://laborke.ru/uplcv?utm_term=gloud+games+hack+apk+download+for+android PDF link annotation
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d03bb58ac0---fujunupomekedet.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/31903860914.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/kimobavokiguvet.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/advnsj9v3utqmcb9njvk6iilti/dovek.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/dibuz.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/44919ca25170bef7bf5d3e8ce0dae7e9/tatonoropudajukofatevikol.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a9b22c7f7---lovumolurukajilelafoged.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0512a73b1c---44459563068.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/713070ce7ee3bfebf8e4b02353fb1a6a/32871829795.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/dotejegusiwakix.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/rc2gjgv9u7oj796cjt0qoklbf5/45919779906.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/kghapa3i8fbto4h64fslggla01/sevodijirogovowarif.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/4d57e6d47ed1a8bdb59853e99ba8c135/48603758127.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/dewaxugumipobakavetutasil.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/72896501277.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEC 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off0000eeaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAF 2912 bytes
SHA-256: b3177c8de935bf2e05ba58035bb430970af2c83108b60a2dfb12b0772094c699
font_02_sfnt_off0000f90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90A 5756 bytes
SHA-256: 6376179e822ee9f780f7089c21ae2885f2632a9286e4c1478cf28af850eca774
font_03_sfnt_off00010c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C90 11976 bytes
SHA-256: a88616ac2d56de75b8b06a1ac06d56a0572dcbc5a37fdc599bebd53caad45dd0

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