Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee48f84ad98b23cd…

MALICIOUS

PDF

72.2 KB Created: 2021-02-22 07:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d92c3bfe50a8f6fc0c7d9f44127fa9d8 SHA-1: 4d7f92b2d05f2bfc6aaa610bac3ed46b175643d9 SHA-256: ee48f84ad98b23cdde4c9cb9f500f0f24b6c6082d41e787b237f069683d9d866
146 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The document body, though heavily obfuscated, suggests a lure related to an electrician exam study guide, which is a common tactic for phishing or malware delivery. The presence of numerous external URIs and its classification as a link farm indicate a strong intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://baarspo.ru/wix?keyword=journeyman+electrician+exam+secrets+study+guide+electrician+test+review+for+the+electrician+exam PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452845/normal_5ff5937b4aaf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410006/normal_600748d6624b2.pdfIn PDF document text
    • http://limevekobo.iblogger.org/49813016614.pdfIn PDF document text
    • https://cdn.sqhk.co/dafiwexoki/c5wjgjg/gaseridaxak.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/d4yibXX/zufewalixujilaxakojute.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391620/normal_5fe14557493bf.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/gdFtUwT/3116774502.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/h3hbiie/49394996306.pdfIn PDF document text
    • http://rabisoluvilava.iblogger.org/19102766925.pdfIn PDF document text
    • https://cdn.sqhk.co/narulaloro/Jwjgieh/aimpoint_pro_vs_eotech_exps2.pdfIn PDF document text
    • http://detaxinema.22web.org/lajifubukefe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497688/normal_600635895fd9c.pdfIn PDF document text
    • http://fumigatoff.online/1268273877d03v5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/how_to_reset_casio_pcr-t500.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/xojej.pdfIn PDF document text
    • http://rajemezipuz.rf.gd/google_ads_search_assessment_answers_2019.pdfIn PDF document text
    • http://mupefapakag.rf.gd/muzokifepufedevozakav.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/free_bassoon_sheet_music.pdfIn PDF document text
    • http://nawupewiviziwik.rf.gd/adobe_analytics_implementation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/happy_birthday_name_cake_image.pdfIn PDF document text
    • http://fenubamijub.epizy.com/best_spreadsheet_for_macbook_pro.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_off0000daf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF1 5748 bytes
SHA-256: f565089d534c726c32624751346e9abad68583cda2d4625c9ea6172f6d097f79
font_01_sfnt_off0000ee6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6A 10472 bytes
SHA-256: 4c5024f379f59f9299f521fb940962b3eebd5d99c2f9b5c30b22fdf2b75b82a9

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