Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a82351e5373a842…

MALICIOUS

PDF

117.6 KB Created: 2021-03-19 09:05:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d07fb8c5368b641297460f25e10ed274 SHA-1: 96bf463de562392cf90156a1e1a67ac10fded7d4 SHA-256: 0a82351e5373a842d1eff6ec99b06f9fcf238c14f777344344742d837f456b02
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://lozipotod.ru/strik?utm_term=how+many+wpm+should+a+1st+grader+read PDF link annotation
    • http://refoxedij.iblogger.org/how_to_enter_cheat_codes_on_pokemon_gold.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484093/normal_604b4cfda75a1.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/g1hbgem/best_hair_salons_in_los_angeles_county.pdfIn PDF document text
    • https://cdn.sqhk.co/tedubifo/eXNiggc/zodosazago.pdfIn PDF document text
    • http://ximikilanad.22web.org/installer_appvn_apkpure.pdfIn PDF document text
    • http://vawokupe.iblogger.org/funotodabigadusatoxobiber.pdfIn PDF document text
    • http://nenugatigubom.66ghz.com/motopunabox.pdfIn PDF document text
    • http://zumarez.22web.org/sprint_planning_meeting_agenda_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426541/normal_601a1c9e4d9ce.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/jjffigB/rally_health_glassdoor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476765/normal_602b4e37771fe.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/bphfogg/24300850074.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421050/normal_5ff7d05978419.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/jdQDJtK/invoice_template_excel_doc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jinibelirakime.rf.gd/31031502334.pdfIn PDF document text
    • http://lelexuxifu.epizy.com/lerujit.pdfIn PDF document text
    • http://kovusilo.epizy.com/boron_family_ncert.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59dd4563-9639-4678-8aca-07604b02bc2f/free_online_coaching_tools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1622836e-5736-4d48-96f4-36ef82617842/xipokov.pdfIn PDF document text
    • http://wadekazu.epizy.com/zebesidewetaliganujoxaviw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/955027dd-a42e-467f-8b54-9ad575c3bfee/bapazedosatizugokadorovo.pdfIn PDF document text
    • http://lumugexov.rf.gd/59528751800.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19018 5580 bytes
SHA-256: a583baf79e3264b0014085e71a1b6829b8d2773d099db16f29a18cf35369df99
font_01_sfnt_off0001a300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A300 11128 bytes
SHA-256: 6d2287233cad7f4729e8015c39f1bee9b245c2e5f81e77abaab68d5a2d7380c7

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