Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba325e3017f5091…

MALICIOUS

PDF

80.6 KB Created: 2021-01-29 04:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 072a18a813bcb92f80cffaffd24efaae SHA-1: 0178ebefdcdaa3a284a9473f3dac1c3165d70310 SHA-256: eba325e3017f5091865c88bc5301c4f2baa1f9628020bb7b58bfe8d6ce4d32a0
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many pointing to disposable hosting and configured as a link farm, suggests a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=the+causes+of+the+french+revolution+%25281%2529+worksheet+answers PDF link annotation
    • https://risenezapaf.weebly.com/uploads/1/3/4/4/134481661/2aa1e6aa3.pdfIn PDF document text
    • http://vermono.site/temple_run_3djwnbp.pdfIn PDF document text
    • https://nawawedivoxoni.weebly.com/uploads/1/3/4/7/134719505/nagafojelexa.pdfIn PDF document text
    • http://tamakar.tech/91880496355heip4.pdfIn PDF document text
    • http://vbruti.site/real_bike_race_2019_game3vsq6.pdfIn PDF document text
    • http://ipatovaalena.ru/994360037658ddfq.pdfIn PDF document text
    • http://aycotoro7.xyz/83620219312tmuj4.pdfIn PDF document text
    • http://pornbustyvids.com/buzz_cut_women_s_hair_carewgjtl.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://bokatamekal.rf.gd/breast_cancer_ribbon_pictures_to.pdfIn PDF document text
    • http://sidunutisa.epizy.com/dark_web_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/pasopetesam.pdfIn PDF document text
    • http://jupuluna.epizy.com/bodyguard_film_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/resugibuxerodab.pdfIn PDF document text
    • http://warixogaje.epizy.com/next_steps_guided_reading_levels.pdfIn PDF document text
    • http://bujuxuvumelijet.epizy.com/malayalam_movie_nostalgic_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/suffix_worksheet.pdfIn PDF document text
    • http://wojudor.epizy.com/best_screensaver_for_pc_free.pdfIn PDF document text
    • http://ferodokibaw.epizy.com/analogue_time_worksheets_grade_1.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_off0000f0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D2 5224 bytes
SHA-256: 75bdc56bf6d6dec4299aea40fff05be0fd2f425a6ef8643d475f0fae9e7d8497
font_01_sfnt_off000102b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B3 10452 bytes
SHA-256: d84f6eb776cd809028c5579c45df822e2c974fbfe034b18c217affcba41c489e
font_02_sfnt_off0001264e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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