Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e4e38caea895b8…

MALICIOUS

PDF

70.5 KB Created: 2021-02-13 08:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 39dd0cd0c278021a11bee9836862aa0b SHA-1: b3d4300b65a1e32e8a048fd0a88ebb6036870852 SHA-256: c4e4e38caea895b8190102b753634c56e9f6ba462bd80e4ea292b0fac2b3e711
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=cheat+bully+geography+4 In PDF document text
    • https://cdn.sqhk.co/javeduner/jdfsha3/strategic_marketing_planning_tools.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500679/normal_5ffdb31cd2f58.pdfIn PDF document text
    • https://lilususuki.weebly.com/uploads/1/3/4/3/134317990/padepuwategobarelu.pdfIn PDF document text
    • http://help-verification.com/prte_de_verbes_frasales_en_des_ainevx0yf.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/ibn9iby/rocket_sky_mod_apk_1._3._1.pdfIn PDF document text
    • https://cdn.sqhk.co/zaborofisi/1ihigQE/field_hockey_world_championship_2022.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426416/normal_5fc84a24e6bce.pdfIn PDF document text
    • http://italywow.info/miwodalesefalisozuvatujop14lm.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/guardianes_de_la_galaxia_2_descargardhy3a.pdfIn PDF document text
    • http://kieverts.xyz/firefox_file_limitl0lqo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368224/normal_5ff05b803251b.pdfIn PDF document text
    • https://megidawuxuta.weebly.com/uploads/1/3/4/7/134729580/ffef803a980958.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/dqhaAjc/xixogagisureribugul.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/luxaduzimase/ijitee_paper_template.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/80063727695.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_off0000d49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49A 5140 bytes
SHA-256: f61ed95dca4678bf4f7fd9b0dd7236e5ce9c2ac788fbf7c986d849478a1683ff
font_01_sfnt_off0000e61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61B 11952 bytes
SHA-256: 37940b1f5d671d6ee68fce4ca6c4292bef21c9627949b6cf72ee48c81583b3b4

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