Malicious PDF — malware analysis report

Static analysis result for SHA-256 75198574bcb86724…

MALICIOUS

PDF

69.9 KB Created: 2021-02-07 06:03:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2fa5c3006aefc9ae5cb80216ada43600 SHA-1: efe5f3dfbca1e3c26180a8b814101fe629b87d72 SHA-256: 75198574bcb867241d7d564e6fcedd381fc862fb95310fc056a2ad5d6b4fc8a7
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of external URIs and the 'link farm' heuristic strongly suggest an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=classics+prom+dresses+jacksonville+nc PDF link annotation
    • https://cdn.sqhk.co/ropikenetu/fqSpEdy/make_item_list_in_html.pdfIn PDF document text
    • https://wuzinetasinozud.weebly.com/uploads/1/3/1/6/131606123/2493581.pdfIn PDF document text
    • https://cdn.sqhk.co/vigefifobot/ek9tjdW/candy_movie_1968_parents_guide.pdfIn PDF document text
    • http://lovechat24.club/dukagikekevafabokuxand1xw.pdfIn PDF document text
    • http://findattime.com/able_free_condolence_card_template00rcp.pdfIn PDF document text
    • http://tuwafanumi.iblogger.org/mawinuv.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/cpKgcji/red_heart_mobile_wallpaper_hd.pdfIn PDF document text
    • http://azorocheat1.xyz/rusalukewudadikonw2ze.pdfIn PDF document text
    • http://fastpeysistem.online/298034869091h8tp.pdfIn PDF document text
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/e73f0f0eabd2.pdfIn PDF document text
    • http://serdyukov.pro/business_operations_manager_description1eu6i.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/rojalexipokadaz/creta_2018_brochure.pdfIn PDF document text
    • http://xepipigedizovo.rf.gd/donoxefidazenufi.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/myriad_pro_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/alto_s_odyssey_game.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_off0000d2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FA 5324 bytes
SHA-256: c5ae5df9888aaefc92786954a9ecb959711ce7dabd90c57d526f97dd0d1cc9f0
font_01_sfnt_off0000e503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE503 11152 bytes
SHA-256: d16a46e29e94d1c3ceff309fbd65ce495ef107487a30eab841726eb7016b3d65

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