Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97c0f9eee7978d7…

MALICIOUS

PDF

84.7 KB Created: 2021-03-18 22:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ebfa2369ae2dd58ba11ccf32ba01a55e SHA-1: 10eb94a72558c216480579d9236f7ef0d52a6e8a SHA-256: c97c0f9eee7978d7dc80bdd1ab87cf8423bf5c111e0cab07f31a7da0099dba7a
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 0.9925

Heuristics 5

  • 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 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://baarspo.ru/wix?keyword=automatic+apk+pro PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486199/normal_5fe2004b71155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446260/normal_60459d1e27ad7.pdfIn PDF document text
    • http://triple-doska1.club/jodha_akbar_all_songs_freez7sfr.pdfIn PDF document text
    • http://storeplus.pro/mgma_psychiatry_salary_2018b79nx.pdfIn PDF document text
    • https://wukemurorafol.weebly.com/uploads/1/3/4/3/134338373/fb925403ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446772/normal_5fdf46fbbadb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501991/normal_5fdbab9b32fb9.pdfIn PDF document text
    • https://febumade.weebly.com/uploads/1/3/4/7/134757335/936237.pdfIn PDF document text
    • https://guvatezip.weebly.com/uploads/1/3/0/7/130776756/4254601.pdfIn PDF document text
    • https://mivewuwadomabat.weebly.com/uploads/1/3/1/6/131606259/593d6c4fa05b8.pdfIn PDF document text
    • http://sun-italy.space/nemevobifotipabagadoper0vkrr.pdfIn PDF document text
    • https://luzibajaxu.weebly.com/uploads/1/3/2/6/132695572/nafexe-kakobexiruwagod-latitaga-sobaza.pdfIn PDF document text
    • https://giwuvapelefawi.weebly.com/uploads/1/3/4/8/134869604/5433930.pdfIn PDF document text
    • http://creditactive.info/xixewuwabukyvcr.pdfIn PDF document text
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/4224548.pdfIn PDF document text
    • https://wetogukonitama.weebly.com/uploads/1/3/3/9/133997956/roruxageno.pdfIn PDF document text
    • https://nodepuje.weebly.com/uploads/1/3/4/5/134518199/miketijola.pdfIn PDF document text
    • http://hhizmet.com/html_css_js_real_time_editor_motiq_researchissm4.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/defipedibe/kumudam_reporter_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e11dbd-07cb-47dd-86d0-f27f334a8738/star_wars_novel_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa7e12f-9f28-4a96-916a-3ddc3522dcce/mecanica_vectorial_para_ingenieros_dinamica_11_edicion_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c86f3fda-3036-408f-b1b5-2ead73c67b46/1989_ford_mustang_gt_for_sale_in_houston.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/59417687755.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/nissan_350z_performance_parts_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/padeziziso.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/43339728636.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECB 4924 bytes
SHA-256: 9dbf88146901fad4065e8d878eb304091a8dd4356e23dee596513eb920a9aba0
font_01_sfnt_off0000ff6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6C 3024 bytes
SHA-256: f271277bc92c8ec255f016eb89af31946ace6cee13b85d2ca72bafc089855a25
font_02_sfnt_off00010aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA0 10956 bytes
SHA-256: 1b7e7d76f9526afae64fbee8c4804d77f893440fda867382b2948b01531b9dd9
font_03_sfnt_off00012fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FDA 16096 bytes
SHA-256: b3966cf2c6ffdff3cbf46f1e9fde5b7adb6d08a09d239bea052f7f498201c009