Malicious PDF — malware analysis report

Static analysis result for SHA-256 305fb58aa94f4f2b…

MALICIOUS

PDF

80.6 KB Created: 2021-06-09 22:35:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b05bbf15eee7f0a00638386849944bc2 SHA-1: 80b88a0ef55faed4e7a8a2d40f99c47bcdf810c3 SHA-256: 305fb58aa94f4f2bcf99ed035fe40b3c4a31966971de4275e4d4800b7ffae1c4
156 Risk Score

Malware Insights

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

The PDF document contains numerous links to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The presence of 'pokemon go hacks apk' in a URL parameter indicates a lure for potentially unwanted or malicious software. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://queure.ru/uplcv?utm_term=pokemon+go+hacks+apk PDF link annotation
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/ab36ebde1384b03052442ef7889c86c2/zaladovumuwabudamelulozi.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4b748e891---bamivami.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/nilixutatevedesekibimej.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/60828198989.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/tokuzoxiwises.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/df8cecd957fb18238649114ed49aa434/51545081597.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/47b93c7c110a7e9035eea091ad1dc3f6/xojekerarezezaxemigiv.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/8c7tbsoorv8vmh5b0f24g7sgkb/71378343825.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2970b29550---31656526761.pdfIn PDF document text
    • http://email-database.info/userfiles/file/96470472960.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace49d09e90---23977993902.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/538c95d095798cab3b35f09e35cacdbb/70797140511.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090738af3de4---vuxavew.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c55774c9b3---sulogesugir.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bc950064a---6189331415.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/2106030549.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/dd263f217118ff6d83bc5b0831f78a08/deveb.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/rojavofevetipanafojad.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC9 5284 bytes
SHA-256: 3d84dbf57b7ce8d69565032c458a67b722dfcb21f5aff14399c7b7fd236ea9b8
font_01_sfnt_off00010daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAA 11876 bytes
SHA-256: 18a2d5010dfe1f20f443c4e3ce844ff583d2467a944f3e51ca966c64290415de