Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49205ed9772dfcc…

MALICIOUS

PDF

78.8 KB Created: 2021-03-15 03:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fa88f15acabe3b0dcdf468c85b102d22 SHA-1: ec1d5a1267d10624b7080f8483d9578eea9c8182 SHA-256: e49205ed9772dfcc96bfd284366893b1ac815ba1bcc5cdeb9216b781ad339d82
186 Risk Score

Malware Insights

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

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 0.9994

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://crophysi.ru/strik?utm_term=international+business+machines+careers PDF link annotation
    • http://kudretbozaci.com/gedawamu5qxfg.pdfIn PDF document text
    • https://cdn.sqhk.co/sowojusawepu/gfxhdhi/offroad_bike_racing.pdfIn PDF document text
    • https://cdn.sqhk.co/melalisopapu/iNgcakL/taza_grill_menu_niantic_ct.pdfIn PDF document text
    • http://leadtop.co/internal_audit_manager_salary_atlanta14fvx.pdfIn PDF document text
    • http://kaboliwup.mypressonline.com/gunujose.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/bMZPKjg/jesefor.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/ranodirelomujatisag.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/gcghegh/telazujolib.pdfIn PDF document text
    • http://rabizepafuxonag.mypressonline.com/18143345794.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/aLhjjgR/jolteon_stats_let_s_go.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/eX7idhh/53897349813.pdfIn PDF document text
    • http://wijofotezopadik.medianewsonline.com/zarewamipe.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/WYW7WZh/blacklight_poweramp_v3_skin_apk_free_download.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/aceros_arequipa_historia.pdfIn PDF document text
    • http://demask.fun/roxajenotebonukinefo8jraj.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/wutezigojuxi/5963333211.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/indian_food_chart_with_nutritional_value.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/tropico_android_apk_mod.pdfIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_0b7ba4c880d24473812b628507bea5f0.pdf?index=trueIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_f298ab7fe4e4404a8134eb44605c9dc0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/55173732697.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/how_to_install_a_threaded_pipe_union.pdfIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_8da19618a862466ebc2c6a7bc9eb1933.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65E 5116 bytes
SHA-256: a8db0ba7445956ef577919c94cf03fc6e88e621620323c8291acbb8628982f5f
font_01_sfnt_off00010795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10795 11232 bytes
SHA-256: 7a3755c4ba4004d3040d4e81d0fc5839c8ebf13288aad9433303b56312b64b65