Malicious PDF — malware analysis report

Static analysis result for SHA-256 6779917212e4791e…

MALICIOUS

PDF

104.1 KB Created: 2021-03-25 16:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5ceb0b47cb10b3ba59b0e25834d576af SHA-1: 5694cfb2e25581ef4d3ccd2a10ee2d2d02ec65ae SHA-256: 6779917212e4791e78a8de4a47384acba7169e4a8c5b9a1624065487273bfc93
126 Risk Score

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/award?keyword=proceso+de+paz+belisario+betancur+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446398/normal_605350fe5676b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_6016845504e40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_60598c16d1163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503387/normal_6052aeb499b86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421335/normal_603743d78fb22.pdfIn PDF document text
    • http://gikizevububem.22web.org/roomba_980_battery_dies_before_docking.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417123/normal_6042d2d51a674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488556/normal_601ae8e2e3961.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413842/normal_603fa28134b0d.pdfIn PDF document text
    • http://zekamuwafevero.iblogger.org/71058852795.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497368/normal_5fc9d599447f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bisiku/k_s_r_t_c_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/fekubul.pdfIn PDF document text
    • http://wuboxobotuz.rf.gd/diagnosis_report_of_diagnostic_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/3693169836.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/ben_carson_books_free.pdfIn PDF document text
    • http://lexaxixamu.rf.gd/jewelry_making_tutorials_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/made_of_sterner_stuff_transformers.pdfIn PDF document text
    • http://zeliganav.epizy.com/factoring_review_sheet_answers.pdfIn PDF document text
    • http://xobiluwova.epizy.com/believer_dj_raj_remix_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb5aa965-ac38-46b9-8c87-484d9296cafb/zugupobapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a712beb-d21e-4bf1-a768-51abd7695cee/que_ao_de_vehiculos_se_pueden_legalizar.pdfIn PDF document text
    • http://poxujub.rf.gd/vezisunenegagejukatowavud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be42099c-d205-4247-ad2f-624720199a00/rabijaxuwomixidesubet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/378707ac-9db6-41c2-993e-af81efe577f3/verbos_irregulares_en_ingles_lista_completa.pdfIn PDF document text
    • http://vamuxusonepuf.rf.gd/anaconda_telugu_songs.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://scripts.sil.org/OFLIn 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_off000140de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140DE 5340 bytes
SHA-256: 717a9eb57d9a52b8ea47bb7382e5a6dccd687ead393d21d3365c3ea279f6740d
font_01_sfnt_off00015312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15312 12520 bytes
SHA-256: 7849aa7d26095e23440a6cbe59a261e4adccab947a44ae63c59e783e54e05f7f
font_02_sfnt_off00017b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B76 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449