Malicious PDF — malware analysis report

Static analysis result for SHA-256 e474cf9865b3c321…

MALICIOUS

PDF

72.0 KB Created: 2021-02-17 02:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a2711e4e84d400cdf55254c6fb6904d6 SHA-1: 65aea41be719d666c740934bfd6a6caeab5661c0 SHA-256: e474cf9865b3c3211dff16314fc240cc7b245950469240fc49874d21b68b53fd
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

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
  • 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 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://crophysi.ru/wix?keyword=a-check+global+drug+test In PDF document text
    • http://parkji5x.xyz/allen_heath_zed_14_manual01knk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460060/normal_5fd21a256197a.pdfIn PDF document text
    • https://cdn.sqhk.co/dosazuleg/efBwhhZ/mopotoxavitax.pdfIn PDF document text
    • https://gabukoxikala.weebly.com/uploads/1/3/3/9/133997771/sunoxedigijef.pdfIn PDF document text
    • http://hotita.fun/stick_fight_shadow_warrior_unblocked5c07x.pdfIn PDF document text
    • http://omoikiri.info/88323068269phv0z.pdfIn PDF document text
    • http://rkconstructionsucks.com/closely_held_trust_reportingv5edb.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/jitimesolagun/user_guide_codeigniter_bahasa_indonesia_zip.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_off0000dc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC69 5424 bytes
SHA-256: 48bb3d5e79205d2a65a1ad55514011cde9eeaaaa744d1b92d603abcd7e14ed61
font_01_sfnt_off0000eed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED8 10796 bytes
SHA-256: 56cb491d6a2e3e3c7b6de29436c994de384ec7de76f26b5d72a1df2598aa32ac