Malicious PDF — malware analysis report

Static analysis result for SHA-256 d452986d62b22493…

MALICIOUS

PDF

75.9 KB Created: 2021-02-27 16:40:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e76bed4d619a0f824adcfb707c90546d SHA-1: 3b4c293464d80d24f1b3b3a8cef3e6c537f20d57 SHA-256: d452986d62b2249369eb22293dc42d8845dfce0d1628da8d4d323021b37ef990
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/wix?keyword=criss+cross+method+chemistry+worksheet In PDF document text
    • https://cdn.sqhk.co/zukuxenopo/aghgec0/47492009935.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/ijgSbjf/table_tennis_touch_mod_apk_revdl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392659/normal_600601976d82d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527747/normal_5fe01ba6e0bad.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/gjmujjr/22447246171.pdfIn PDF document text
    • https://cdn.sqhk.co/balapakufogo/bHCMijp/football_agents_in_europe.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/jfmAnja/16128428195.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/71299296776.pdfIn PDF document text
    • https://cdn.sqhk.co/jofutagi/d35jYhj/36435186555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482645/normal_6028852dbe6a6.pdfIn PDF document text
    • https://cdn.sqhk.co/jivobukafon/vAZifVZ/30664515380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_60222ffe812a3.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/c2ihdgc/city_driving_3d_apk_indir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365598/normal_5ff04bb80abf3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nedomawof.rf.gd/the_beggar_s_opera_text.pdfIn PDF document text
    • http://tofezaniv.rf.gd/flowchart_creator_template.pdfIn PDF document text
    • http://bekogufepe.rf.gd/thyroid_eye_disease_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/age_of_empires_3_strategy_guide.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_off0000eda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA8 5100 bytes
SHA-256: 8e4a591fd4eb5d5f9c3aa6ffc98141171f43b7f0f6e8722ef00d09f20f602db4
font_01_sfnt_off0000feed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEED 10344 bytes
SHA-256: cb7d6a8bc81411c5a9d5e5ad24ae1787fd1dd8d188bb663003033b41e41fa7f7

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