Malicious PDF — malware analysis report

Static analysis result for SHA-256 df12ecf86a9dca5a…

MALICIOUS

PDF

69.4 KB Created: 2021-02-26 04:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 14b450a4457d66440644df2c2642fc7d SHA-1: 2bfa22782575d305398a1d9fbc32fbcfcb96a61d SHA-256: df12ecf86a9dca5aa8a24c664812eb7d42fbdf5c69589378164975b7d4498792
184 Risk Score

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
  • 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://yafferge.ru/award?keyword=law+of+contract+notes+in+hindi+pdf In PDF document text
    • http://nat-yoga.space/whirlpool_wtw5000dw1_parts_diagramtwwqz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506159/normal_5fda767b007ce.pdfIn PDF document text
    • https://liruviwogaralo.weebly.com/uploads/1/3/0/7/130776788/moriferir-juwog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385850/normal_602f751aa6813.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375339/normal_5fddf590a1e20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413701/normal_5fd9430522e26.pdfIn PDF document text
    • https://tabutepapuwup.weebly.com/uploads/1/3/0/7/130740025/7252460.pdfIn PDF document text
    • https://gopaxabog.weebly.com/uploads/1/3/5/3/135309926/7526420.pdfIn PDF document text
    • https://boboxike.weebly.com/uploads/1/3/2/7/132710801/6781849.pdfIn PDF document text
    • http://xedekozis.22web.org/easy_knex_car_instructions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozefemalevarug.rf.gd/facebook_video_er_hd.pdfIn PDF document text
    • http://vomonulesew.rf.gd/donixopase.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/lizilesezikilidid.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/19336695031.pdfIn PDF document text
    • http://sabukizazuse.epizy.com/android_auto_wireless_apk.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_off0000d45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45F 5244 bytes
SHA-256: 1bd438ee18d2e4c0a0cc117da3afc54747aae63691672cc4dd3700d0b7a1f9a3
font_01_sfnt_off0000e64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64E 10060 bytes
SHA-256: 17a20d64c4f1f138eba8d94c74826ce4109913c8ba125f960af022961b4a3658