Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba14594aa5de32c…

MALICIOUS

PDF

80.7 KB Created: 2021-02-22 18:21:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 91c9b7135aa8460101c968f9af5c60fb SHA-1: f369d2313fb1d1cd588412dae3e42b5016ad8b7c SHA-256: 7ba14594aa5de32cc91090f359e696a652cc0ebd631bcd67f45e29dd178ff8d7
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable hosting domains, suggesting a link farm or phishing campaign designed to redirect users to malicious content. The presence of a link to a known malicious redirector infrastructure further supports this assessment.

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://crophysi.ru/123?utm_term=what+is+the+correct+tire+pressure+for+a+toyota+camry In PDF document text
    • https://wipowolulufobud.weebly.com/uploads/1/3/1/4/131437369/kimebujaxorevevali.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421637/normal_5fddf9ac20a1c.pdfIn PDF document text
    • https://cdn.sqhk.co/dogovonediwa/igghclJ/minecraft_2021_update_youtube.pdfIn PDF document text
    • http://ruloposozaxekon.iblogger.org/43669038040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485301/normal_602e73413699a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5fd746d223d90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465914/normal_602cd686ae46a.pdfIn PDF document text
    • https://cdn.sqhk.co/kowetitemaro/aiejjgc/tiberirisebogadewu.pdfIn PDF document text
    • https://cdn.sqhk.co/dajusonas/fbzwj1q/slendrina_the_school_game_apk_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://poteluvomak.rf.gd/diabetes_treatment_guidelines_chart.pdfIn PDF document text
    • http://nakulugexogi.rf.gd/arya_telugu_film_ringtones.pdfIn PDF document text
    • http://fedetikapore.epizy.com/72908026347.pdfIn PDF document text
    • http://tufelorit.rf.gd/days_of_the_week_tracing_worksheets.pdfIn PDF document text
    • http://bunokulenixa.epizy.com/21707258201.pdfIn PDF document text
    • http://wogekipa.rf.gd/besiege_water_mod.pdfIn PDF document text
    • http://duloduxu.epizy.com/alien_covenant_full_movie_in_tamil.pdfIn PDF document text
    • http://poserub.rf.gd/kant_answering_the_question_what_is_enlightenment.pdfIn PDF document text
    • http://relogevavikidid.epizy.com/burglar_alarm_project_report.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_off0000ff47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF47 5336 bytes
SHA-256: adb9f20bfc566b8a3b034fc1a9b15f68e5ba74fe4f7795f2dace22662af70738
font_01_sfnt_off0001115b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115B 10632 bytes
SHA-256: b326d4c5be6dabf3740e97f130ce8b7fa6442cedb353fe3b53ddbaf7833dcfaf

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