Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a42aecdcb516b8…

MALICIOUS

PDF

78.9 KB Created: 2021-03-08 16:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 026d94e1f1253ad18fa7400e81a03000 SHA-1: e310092fc242484d60b1784c6c824643f6e25767 SHA-256: 00a42aecdcb516b879b0ae8f7eb46319b4d2453fa4c016cdc824d0c4b5259918
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malware or phish users. The document body, though heavily obfuscated, contains references to song downloads, likely a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/123?utm_term=amman+kovil+kizhakale+songs+free++starmusiq PDF link annotation
    • http://tudovawo.22web.org/vans_old_skool_platform_checkerboard_sale.pdfIn PDF document text
    • https://repavubujog.weebly.com/uploads/1/3/4/4/134486674/528966a.pdfIn PDF document text
    • http://masovizifuzaro.iblogger.org/inequalities_word_problems_worksheet_kuta.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/iijgjdB/42067750015.pdfIn PDF document text
    • http://gotosutafizal.iblogger.org/ruxaj.pdfIn PDF document text
    • https://golagunowij.weebly.com/uploads/1/3/2/6/132695575/tavamexi_vuwolovupiv_fumonaji.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwuwoki/sK8ZWgc/51543811369.pdfIn PDF document text
    • http://ralanizu.iblogger.org/invoice_print_template_odoo.pdfIn PDF document text
    • https://poxovoxi.weebly.com/uploads/1/3/5/3/135398301/jipubojerijolefon.pdfIn PDF document text
    • http://rutuwizozorasu.iblogger.org/comptine_dun_autre_t_guitare_partition.pdfIn PDF document text
    • https://kuvitoguke.weebly.com/uploads/1/3/0/8/130813837/patutalenolanu.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/JjdTBTQ/55432846562.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_4f5f7e202d294cda815abee96fdf25fe.pdf?index=trueIn PDF document text
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_7fbcc0b0cf65496bb24cec8f82b9dec7.pdf?index=trueIn PDF document text
    • http://gijalodev.rf.gd/45370951575.pdfIn PDF document text
    • http://wekidezeze.epizy.com/vifabovok.pdfIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_900296d7a61943fa9cfd31a7e0d0bc64.pdf?index=trueIn PDF document text
    • http://wolodavufaxus.rf.gd/mupodomozitozigabelazuf.pdfIn PDF document text
    • http://zekibinixosa.epizy.com/3d_anatomy_app.pdfIn PDF document text
    • http://kagabefusexem.epizy.com/dental_auxiliary_timesheet.pdfIn PDF document text
    • http://jonegukum.epizy.com/vobejuzafap.pdfIn PDF document text
    • http://xotepugiz.rf.gd/lumexut.pdfIn PDF document text
    • http://nogobixa.epizy.com/anatomy_program_for_pc_free.pdfIn PDF document text
    • http://ruwapebubori.epizy.com/minions_3_full_movie_in_english.pdfIn PDF document text
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_755d5920a04a477eb86e0930ad3c1468.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f9f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF9F8 3760 bytes
SHA-256: 757b6b09fed599eda16d3549cd97b4932da8fa07af97187020eccdfa0d95e03f
font_00_sfnt_off0000e77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77C 5472 bytes
SHA-256: 7ad1bbac1e1cac4520697e2d01ed9ddf9b9d62a7e6c62002cb696deb7e9cc4a9
font_02_sfnt_off00010820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10820 10784 bytes
SHA-256: 9e527d37430fde41b03f5018f143dfa90183e9104f3bdbe3802087fdd5076d90