Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be9c026f8385d6b…

MALICIOUS

PDF

105.3 KB Created: 2021-04-09 07:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4da89e95e8e70f8e3260d66614f5ef11 SHA-1: efd47ebdd43a9faf373c5ad4db809a95adf098d3 SHA-256: 8be9c026f8385d6bdc40df8ea0c8ffe051a92ac837fcfebd630e745f94614fd2
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9987

Heuristics 4

  • 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://druttle.ru/strik?utm_term=how+to+do+road+to+hana+on+your+own PDF link annotation
    • http://jeratojovu.66ghz.com/36986405429.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459788/normal_5feddde027ccc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393028/normal_5fe08037df384.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/how_to_program_a_rain_bird_sprinkler_system.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_5fd666605ecaa.pdfIn PDF document text
    • http://felulam.22web.org/27153779598.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473892/normal_5fe2a532db808.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://nemenarubaz.atwebpages.com/ziguwudapapafuzoma.pdfIn PDF document text
    • http://jomexikosuzujis.rf.gd/sprinkler_irrigation_types.pdfIn PDF document text
    • http://lujarozukivexoz.epizy.com/3930893861.pdfIn PDF document text
    • http://perepidowowavam.epizy.com/stop_questionnaire_sleep_apnea.pdfIn PDF document text
    • http://wajabopekat.epizy.com/70895627761.pdfIn PDF document text
    • http://talagolow.rf.gd/aprender_a_tocar_guitarra_electrica_desde_cero.pdfIn PDF document text
    • http://pibamifa.rf.gd/tintern_abbey_analysis_nature.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/anonytun_untuk_android_2._3._6.pdfIn PDF document text
    • http://suvibada.epizy.com/norediditemi.pdfIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/95559038238.pdfIn PDF document text
    • http://bikumekomem.epizy.com/poxes.pdfIn PDF document text
    • http://lenofafezanobu.atwebpages.com/94919957022.pdfIn PDF document text
    • http://lajobeg.epizy.com/95404122803.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/release_notes_template_for_software.pdfIn PDF document text
    • http://webukoxaxox.rf.gd/41279295875.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A9A 4572 bytes
SHA-256: 2885294fb4d218feeface891567bf374ebb4b1437ce7579320f4d584a6c3ce99
font_01_sfnt_off00015a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A0D 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0001629b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1629B 11216 bytes
SHA-256: f2dfcdd297d919e2def46070ca1fe72e5163e2ee13cbb7d0d6b203cc35b03f74
font_03_sfnt_off000188a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188A7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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