Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a65e55ee604573…

MALICIOUS

PDF

73.9 KB Created: 2021-03-25 12:59:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a1df51770d0a6f3117a74c5b1b79565a SHA-1: 1db906c071219052072e9928f007f1b20b04c402 SHA-256: 52a65e55ee604573b58dc5abcbab7dbb18c767c744f7c86892069a138b615ff1
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, particularly those pointing to Weebly and other hosting services, suggests an attempt to redirect users to potentially harmful content or phishing sites. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://pelibifir.ru/123?utm_term=angelo+busta+adieu+daishi PDF link annotation
    • https://jekaboda.weebly.com/uploads/1/3/5/3/135398795/petosa.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/fjehb8S/canvas_sheets_for_inkjet_printers.pdfIn PDF document text
    • https://cdn.sqhk.co/datisafapuv/gghZhhn/koveb.pdfIn PDF document text
    • https://cdn.sqhk.co/nazalugewu/geNjcM0/download_manager_android_tv_box.pdfIn PDF document text
    • https://tedomidile.weebly.com/uploads/1/3/2/7/132712102/534db79d64cdef.pdfIn PDF document text
    • https://gejilesiwurulu.weebly.com/uploads/1/3/4/3/134374779/varetevu_zilevef_jabojikaf.pdfIn PDF document text
    • https://cdn.sqhk.co/lusoxepero/4rG0hbU/nusogazinaw.pdfIn PDF document text
    • https://foserexekoxa.weebly.com/uploads/1/3/0/7/130740627/13d3a4a7c.pdfIn PDF document text
    • https://cdn.sqhk.co/xiruregexibe/EShbNjd/3d_bass_songs_mp3_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/wYRThhr/60695953837.pdfIn PDF document text
    • https://cdn.sqhk.co/siwuvulutip/Mxfhjhc/pockets_billiards_and_brew_san_diego.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/2fc2b14e43.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/fuvidokibet/dd_5e_unearthed_arcana_tunnel_fighter.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/delodekazewupefoz.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/ownership_structure_and_firm_performance_in_malaysia.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_e143b1b3a40b4aa78e1fea7b0e59b3cc.pdf?index=trueIn PDF document text
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_388241ac8bed405eb07cc2004b5bd952.pdf?index=trueIn PDF document text
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_a0a5c86008a548deaad6674412ade6d1.pdf?index=trueIn PDF document text
    • https://2521c3e2-5736-45bb-9381-71005f2ffa37.filesusr.com/ugd/c85705_f0f302c7c5db4d3094b5062f344379a3.pdf?index=trueIn PDF document text
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_669f34e3377941189ffa5397b8c6fa5f.pdf?index=trueIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_22ee4fe4a6c749d98a414b10e99efa8c.pdf?index=trueIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_0ee2e703ca9b4f1b9f89ec6153afbd59.pdf?index=trueIn PDF document text
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_4b5107f23c1043698a0e8e80ac09212c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorogamat/gre_test_score_percentile_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/basal_cell_carcinoma_management_guidelines.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BB 5120 bytes
SHA-256: 575c51bf199ca7241515077b8e372876c670f75fdfcd79c2826531a3993b981c
font_01_sfnt_off0000f21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21F 11980 bytes
SHA-256: 73a1c18f73e78f3a7f4f0dd71f9aff4e94725bc85b4476fed21335d2d04bd733