Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e809eb7e9c7ec52…

MALICIOUS

PDF

73.3 KB Created: 2021-02-14 15:31:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a767aedbddb0742a5f84441ad92e2151 SHA-1: aade54b2267177efed7a2b5bdd6acf93b150e7a7 SHA-256: 8e809eb7e9c7ec520f92f536edc483b0926059dcde64eddbd840ca22c9437bb8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the document is designed to host many links on disposable hosting, reinforcing the malicious nature.

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://jacksth.ru/aws?utm_term=design+evo+logo+maker PDF link annotation
    • https://cdn.sqhk.co/ruzaxube/gc8sihW/v_live_club_detroit.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/iififhG/scary_teacher_mod_apk_unlimited_energy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368238/normal_600909f24b6db.pdfIn PDF document text
    • http://trylait.pro/three_billy_goats_gruff_puppet_templates2w55u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458633/normal_6010ea91778e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411694/normal_5ff7809d2bffe.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/SVTDRhd/wurupovep.pdfIn PDF document text
    • http://xruhdfo.site/la_cicala_e_la_formica_ristorante_butifwrcg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409801/normal_5ff1268a6af38.pdfIn PDF document text
    • http://savadaqwe.space/pokemon_let_s_go_eevee_guide4o4si.pdfIn PDF document text
    • https://cdn.sqhk.co/zotiperugi/fAwigp3/disokesajovikaxawu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401982/normal_5fe2b7ce5ca05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://viladitotaxuf.epizy.com/margin_call_full_movie_hd.pdfIn PDF document text
    • http://pixagikaw.epizy.com/kusudunipugigeturidomax.pdfIn PDF document text
    • http://nupakavidowux.epizy.com/calligraphy_practice_worksheets.pdfIn PDF document text
    • http://rijujala.epizy.com/action_words_worksheet.pdfIn PDF document text
    • http://bepinutarefe.rf.gd/dudixabejomazez.pdfIn PDF document text
    • http://wuvuwipiwizovid.epizy.com/ropuleganokabebil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A3 4836 bytes
SHA-256: 06be08d02910247cc1b79a40d7d5a81a39bb0b4f887c294e09d1b56f87d228b0
font_01_sfnt_off0000e5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F4 10732 bytes
SHA-256: 5b0bc1a5954a9999066f1fd6fb949e25f5b1bd5e5adc765d4b7f40ce0cb3634e
font_02_sfnt_off00010a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A67 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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